Preparing date: 31/3 Teaching date: 6/4/16 Period 12 PRACTICE I AIM: 1.Knowledge- Sts know powers definition - Sts have skill finding reciprocals calculating division of fractions, finding variables Skill : -Train students to be careful and accurate(chinh xac) when solving problems II Method : Practice, discuss difficutly problems III Matirial: Colour chalk, sheet of paper IV Procedure Organization: 6A 2.Warm-up Teachers ativities Activity 1: + Teachers put test questions St1: Correct 78 (Workbook) St 2: Write the sum of the following numbers as product + + 5+ 5+ 5; a + a + a+ a+ a+ a + Tc: The sum of equals terms we can write shorthands by can using product So the product of many factors equally how we write? III New lessons: Teachers activities Students ativities St 1: aaa : a = 111 abab : ab abcabc = 101 abc : = 1001 St2: + + 5+ 5+ = a + a + a+ a+ a+ a = a Students activities Activity : 1,Power of natural number : + Tc :We can write shorthands : 2.2.2.2.2.2 =2^5 a.a.a.a=a^4 HS: 7.7.7 = 73 b.b.b.b = b4 Similaly, write the following product: a a a ntthwasố a a a ntthwasố 7.7.7; b.b.b.b; ) (n0) + Tc : Intruct students how to read 3^7 reading is to the power of or to the seventh or the seventh power of +3 is called the base, called is the exponent.Similarly, read b4 , a4 , an Plese onlythe base and the exponent ? + Tc : Plese outlined(neu ra) the nth power of a Write the general formula + Tc: Muntiplication of many same factors is called raising to a power + Tc: Ask students to perform ?(Called each students to read results fill in the blank on the side paned) + Tc: Emphasize(nhấn mạnh) In a power of natural numbers(different from 0) : - Said base value by a factor of several - Said exponent number of the factors are equal + Tc : Note - a2 is also called a squared (or the square of a) - a3 is also called a cubed (or the cube of a) - a1 =a Activity : Muntiplying two powers with the same base + Tc: Write the product of the two following powers as a power: a 23 22; b) a4 a3 + Tc: What I can comment on the exponent of = an (n0) Sts : paying attention Sts: Standing still read, clearly indicating the base and exponent Sts: (Framed section textbook P.26) ?1 Power Base 72 23 34 Expone Value nt of power 49 81 Students attention in textbook Students go to the board: St1: 23 22 = (2.2.2).(2.2)=25 St2: a4 a3 = (a.a.a.a).(a.a.a)=a7 St: When multiplying two powers with the same base: - We preserve the base th result with the exponent of the exponential - Add the two exponent + Tc:How you want to multiply two powers St read notes on textbook (P.27) the same base? Tc: am.an =? IV Consolidation Activity : Practice + Tc: Asking questions 1Repeat the nth power of a and write the a2=25=52 a=5 formula a3=27= 33 a=3 Find natural number x,given that: a2=25; a3=27 St repeat the definition : Compute: a3.a2.a5 a3.a2.a5=a3+2+5 =a10 E xercise 56 on textbook P.27) St go to the board doing the exercise (Called students go to the board) 56a,b,c,d Homework + Exercise 57 -> 60 (P 28) Textbook ; 86-90 (P13) workbook + Preview the exercises in the practice - Preparing date: 13/9/2016 Teaching date: 6AB: 20/9/2016 Priod 13: Practice A.Aim : Knowledge: - St distinguish between base and exponent -St understand defined powers - St know shorthand a product of equal factors by using power Skill: - Skill training implemential exponential calutions with naturul exponent proficient Attitude: - Exercise logical thinking ability student Teachers Activities Students activities Activities : + Tc : Check for student +St1 : Write the definition of a degree n St1: Speech and writing defined general exponential and general formular + Calculate : 33.34 ; 52.57 ; 75.7 III.New lesson: Teacher activities Activity : Form 1: Write a natural by the power Exercise 61 (P.28 Textbook) (Tc call sts go to the board, under the whole class working together and comment Exercise 62 ( P.28 Textbook) + Tc call sts go to the board, each student one sentence + Tc collection and scroing fast exercise of sts +Tc : What you comment form the exponent of power with digit after digit in value of powers ? Activiy : Form 2: True or False Exercise 63 (P.28 textbook) + Tc call sts stand in place answer and explain, why true? Why false? Activity : Form : Multiplying powers + Tc call sts go to the board at the same time calculations formula as textbooks 102=10.10=100; 53=5.5.5=125 St2: General writing such as textbooks 33.34 = 33+4 =37 52.57= 52+7 =59 75.7 =75+1=76 Studentactivities St go to the board St1: 102=100; 103=1000; 104=10000 105=100000; 106=1000000 St2: 1000=103 ; 1000000=106 tỉ =109; 00 12chuso = 1012 St: Exponent of base 10, how much is the value of exponential contraction after flying more digits digits 1.1 Sentence 23 22 = 26 23 22 = 25 54 = 54 a 29 b 1010 c x6 True x d a10 Activity : Form : Compare number Exercise 65 (P.29 Textbook) Teachers guide the students work in groups and commented how each team Exercise 66(P.29 Textbook) +Ask students to read carefully and anticipate threads 11112=? + Call sts answer then the class use computer and check result a 23=8; 32=9 but 8 52 d) 210=1024>100 St:11112=1234321 The base have digit 1, midle digit is sides of the digits decreases in the number IV Consolidation - Repeat definition the nth power of a St answers techerquestion - When multiplying two powers with the same base, how we do? V Homework: + Do Exercise 90-93 (P.13workbook) , Exercise 95(P.14) SBT spend for ells + Read before: Dividing two powers with the same base -Preparing date: 20/9/2014 Teaching date: 6AB: 22/9/2014 Priod 14: DIviding two powers with the same base A.Aim: Knowledge : - St understand formula of diving of two powers with the same base, convention a0=1(a0) - St know dividing of two powers with the same base Skill:: - Training for students when applying accuracy rules exponentially multiply and divide two base same Attitude : - Exercise logical thinking ability student B Prepare : Tc : Side-table St: Group-table C Method: Training and practice, work in group D Procedure: I: Organization: 6A II Warm-up Teachers activities Activity : + Tc : Question : - When multiplying of two powers with the same base, how we ? - Write form in general ? - Exercises 93(P.13)workbook III New lesson : Teacheractivities Activity : Example : +Tc:St read and exercise 1(P.29) textbook + Tc call st go to the board and explain + Tc request st compare between the base of the dividend,divisor and the base of quotient + Let perform a9 : a5 and a9 : a4 what we need conditions?Why? Students activities St: Write the general as textbook Exercise 93(P.13)Workbook a) a3.a5=a8 b) x7.x.x4=x12 Studentactivities ?1: 57 : 53 =54(=57-3) 54 53=57 57 : 54 =53(=57-4) 54 53=57 a9 : a5 = a4(=a9-5 ) a4 a5 = a9 a9 : a4 = a(=a9-4 ) a5 a4 = a9 - The exponent of quotient equal brand exponent of the dividend and divisor -a0 because the divisor cant divided by Activity3 : In general: St: am : an= am-n (a0) + Tc have am : an with m>n ta có KQ nh nào? +Tc: Convention a0=1 St: a10 : a2 =a10-2=a8 + Tc: Calculate: a10 : a2 Sr: Stated + Tc: When dividing of two powers with ?2: a) 78 the same base, how we do?( call st a x3 answer question) b + Tc request st exercise ?2 textbookSGK Activity4 : Note: St: Paying attention + Tc instructors st write the number2475 in the form of sum of powers of 10 2475=2.1000+4.100+7.10+5 = 2.103+4.102+7.10+5.100 Groups exercise ?3 + Tc:Note: l 2.103 is the sum 103+103 + Teachers ask students to group activities once?3 (representative group and whole class presentations comment) IV.Consolidation: Activity :Practices Exercise 69 (P.30) textbook St answers: Exercise 71(P.30) textbook (Called students go to the board) St go to the board: a c=1 b c=0 V Homework: +Study of the general form Dividing of two powers with the same base +Do exercise 68,70,72 (P.30,31) Textbook exercise 99-103 (P.14) workbook + Research article: Order of doing operrations * TC: Introduce students to the main methods and guidance for students past a and b in exercise 72 (P.31) Textbook: 13 + 23 = + = is a perfect square ( because = 32) - Preparing date: 20/9/2014 Teaching date 6AB: 23/9/2014 Period 15: Order of doing operrations A Aim : Knowledge : - St understand convention about order of doing operations - St know apply conventions to calculate the value of expressions Skills : - Training skill to calculate Attatude : - Training to calculate carefully for sts B Compare : Tc : Side-table St: Group-table C Method : Training and practice, work in group D Procedure: I: Organization: 6A II Warm-up Teachers activities Activity1 : Correct exercise 70(P.30)textbook Call st comment exercise in the board III New lesson: Teachers activities Activity : Repeat exprestion: + Tc:Give some examples about expressions + Tc: Repeat the note in textbook Students activities st go to the board and do: 987=9.102+8.10+7.100 2564=2.103+5.102+6.10+4.100 Students activities St give an example about expressions St read again te past note in textbook Activity3 : Order of doing oparetions in exprestion +Repeat order of doing operations learned + Tc: Order of doing operation in epression We comment each case: a) With the eprestion dont have parenthese + Tc: Request st repeat order of doing operations If division have both additon, subtraction, multipication , what we do? + Tc: Calculate: a 48-32+8 b 60:2.5 + Tc:If there are additions, subtractions, multiplication, division and exponent, what we do? + Calculate the parenthese: a) 4.32-5.6 33.10+22.12 b) For expression have parenthese, what we do? + Calculate the value of expresstions: a 100: { 2[ 52 (35 8)]} [130 (12 4) ] b 80(Tc collection and scroing fast exercise of sts) + Tc Request sts exercise ?1 + Tc: Request st groups activities practice (Representative group and whole class presentations comment ) St repeat order of doing operations St repeat as textbook +) st go to the board ,under the class doing together a) 24 b) 150 St repeat as textbook St1: a) St2: b) 318 St : Statement as textbook St1: a) St2: b) 14 +) St exercise: a 62: 4.3 + 2.52 = 36:4.3 + 2.25 =9.3 + 2.25 = 27 + 50=77 b 2(5.42-18) = 2( 5.16 - 18) =2(80-18) = 2.62 =124 ?2 Find the number x: a ( 6x 39 ) : = 201 x =3 b) 23 + 3x = + 53 x = 34 IV Consolidation Activity : Practice -Repeat order of doing operations in epression (dont have parenthese, have parenthese) +Tc use side-table exersise 75(P.32) textbook(call st go to the board) St repeat framed section Exercise 75: +3 x4 12 15 60 a) b) x3 15 -4 11 Exercise 76: St read exercise listen tc guide + Tc request st exercise 76(P.32) textbook 22 : 22 = : +2: = - Request st read exercise carefully ( + + ) : = - Guide st the first sentence: : = 2.2-2.2=0 22-22=0 2-2+2-2=0 - Similar,call sts go to the with result equal 1,2,3,4(note : have different way) V Homework + Study of the farmed section + Do exercise 73,74,77,78(P.32,33)Textbook,104,105(P.15) workbook + Preview exercises in the practice + Prepare calculator in after period Preparing date: 20/9/2014 Teaching date 6AB: 27/9/2014 Period 16: Practice A Aim : Knowledge: - St know how to apply the rules of order of doing operations in expressions to calculate the value of expression Skills : - Training skill to calculate Attatued : - Forge for st carefullyand accurately while calculating Actyvity Review concept fractions basic properties of fractions 1)Consept of fraction: T: How are fractions? For example a fraction less than 0, a fraction equal to 0, a larger fraction Sts state concept fractions For Exemple 2) Basic properties of fractions a) - State basic properties of fractions? State the general form Then teacher bring up the screen " sts state basic properties of fractions, state the general form Basic properties of fractions Exercise 155 (p 64 textbook) Fill in the squares with suitable numbers Exercise 156 ( 64 textbook) Reduce: a) b) Exercise 158( 64textbook) Compare two fraction a) and b) and gv: Request hs homework and request student go to the board If two fractions have the same denominator negative must change in order to have the same denominator positive sts : To compare two state concept fractions_ + Write them in the form of two fractions with the same denominator positive + Compare particles together state concept fractions that larger particles are larger Activity The calculation of fractions 1) Rule fractions calculations Sts answer questions - State rules add in the case of two fractionswith same dinominator , not the - State rules except fractions, multiplivation fractions, dividing fractions fractions calculations a) Adding two fractions with the same denominator Sts fill the formula b) Tr phõn s: = c)Multiplication of fraction: d) Division of fraction : 2) Properties of addition and multiplication of fractions T given the "Properties of addition and multiplication of fractions" Request sts his statement that the contents of nature Sts state the properties of addition, multiplication fractions into words Operations Addition Multiplication Prperties Commutative Associative Adding to number Multiplying by number Oppositenumbers Reciprocal Distributiveproperty of multiplication over addition Exercise 161 ( 64- textbook) Calculate: Sts answer questions and homework sts go to the board Request sts exercise Exercise 151 p 27 workbook and 162a ( 65 textbook) Sts group activities Activity Consolidation Exercise Choose the correct answer 1) Suitable number of blanks is A:12; B:1 ; C:-2 1) C 2) Suitable number of blanks is: A:-1 ; B:1 ; C:-2 Exercise 2: True or fale 2)B 1)True 2)Fale 3) Fale Activity Homework: - Review of Chapter III of knowledge, to review three basic math fractions After further review details show - - Homework: 157,159,160,162b; 163 (65 textbook) 152 (27 workbook) Preparing date: Teaching date: Period 107 CHAPTER III REVIEW I Aim - Continue to strengthen the focus of the program knowledge - Train skill at expression value calculation II Method : Practice, discuss difficutly problems III Matirial: Colour chalk, sheet of paper IV Procedure Organization: 6A Teachers ativities 2.Warm-up Students ativities Hs1: Phân số gì?St1: What is fraction? Phát biểu viết dạng tổng quát tính chất phân số T requests Sts to represent and write basic properties general fomular of fractions Exercise 162b( P 65) Find x, given that: 11 = 14 Hai hs lên bảng Sts go to the board HS1trả lời câu hỏi ghi công thức tổng quát chữa tập 162 (B) SGKx = St1 answer the question and write down general formula, then correct the exercise 162b) (4,5 2x).1 Hs2: Nêu quy tắc phép nhân phân số? Viết công thức How is the multiplication rule of fractions? Phép nhân phân số có tính chất gì? Chữa tập số 152 ( 27 SBT) What properties does the multiplication of fractions have? Exercise 152( P 27, workbook) HS2:trả lời câu hỏi ghi công thức tổng quát Chữa tập St2: answer the question and write down general formula Correct exercise 13 =- 13 12 104 24 0,75 + 25% : 15 13 195 47 Review Review three basic problem of fractions Tóm tắt: Exercise 164(65 Textbook) Outline Gv yêu cầu hs tóm tắt đề 10% giá bìa 1200đ Để tính số tiền Oanh trả trớc hết ta phải tìm 10% of cover price is 1200đ gì? Tính số tiền Oanh trả? In order to calculate the amount of money How much money does Oanh have to pay ? which Oanh has to pay, What we have to Để tính số tiền Oanh trả trớc hết ta cần tìm giá bìa find the first ? In order to calculate the amount of money which gv lu ý toán tìm số biết giá trị phần Oanh has to pay, we need to find the cover price Solution: trăm Giá bìa sách là: Nêu cách tìm The cover price is Gv đa bảng Ba toán phân số 1200:10% = 12000 (đ) Số tiền oanh mua sách : The amount of money which Oanh bought the book is: 12000 1200 = 10800đ ( : 12000.90% = 10800 ( đ )) Solution: Bài 166 ( 65 SGK) Exercise 166(65 Textbook) Gv dùng sơ đồ đoạn thẳng để hớng dẫn hs Các nhóm hs làm Gv kiểm tra kết vài nhóm Bài 165 ( 65 SGK) Exercise 164(65 Textbook) Hs dới lớp làm, hs lên bảng làm Học kì I , số HS = số HS lại = số HS lớp In semester I, the number of good students = The remaining students = All student in class Học kì II , số HS giỏi = số HS lại = số HS lớp In semester II, the number of good students = The remaining students = All student in class Phân số số HS tăng : The fraction which shows the students increased is 2 18 10 = = 45 45 số HS lớp ( the students in class) Số HS lớp : The number of students in class is: 45 = = 45 8: 45(HS) Số HS giỏi học kì I lớp : In semester I, the number of good students in class is: = 45 10 ( HS ) Một nhóm lên bảng trình bày nhóm khác nhận xét , góp ý HS làm tập , HSlên bảng giải : Lãi suất tháng : The interest rate each month is: 11200 100% = 0,56 2000000 % Nếu chuyển 10 triệu đồng lãi hàng tháng : If deposite 10 million dong, then the interest rate each month is: 0,56 = 100 10 000 000 56 000 ( Đ) Sau tháng , số tiền lãi : After months, the amount of interest is: 56 000 =168000 (đ ) Consolidation:(1' ) 14 15 Bài 6: Viết phân số dơis dạng tích hai phân số , dới dạng thơng hai phân số? 14 15 Exercise : Write fraction in the form of product of two fractions, quotient of two fractions Bài 7: So sánh hai phân số: Exercise 7: Compare fractions: 23 47 25 49 A= 10 + 10 a) ; b) Bài ( Bài 155 trang 27 SBT) Chứng minh: Prove that: S= B= 10 10 1 1 1 1 + + + + + + < 13 14 15 61 62 63 Homework Ôn tập câu hỏi Ôn tập chơng III, hai bảng tổng kết ( trang 63 SGK) Review all questions in chapter III review, two summary tables( P 63- Textbook) Ôn tập dạng tập chơng, trọng tâm dạng tập ôn tiết vừa qua Review all problem forms in chapter, whose focus is problem forms reviewed through two above period Preparing date: Teaching date: Period 108 REVIEW OF THE END OF SCHOOL YEAR I Aim ,, , , - Review some symbols of set: , review rules of divisibility by 2;3;5;9 Prime numbers, composite numbers Common divisors and common multiples of two or more numbers - Train skill at expression value calculation Sts have skill using symbols of set Applying rules of divisibility, common divisors and common multiples to solve problems II Method : Practice, discuss difficutly problems III Matirial: Colour chalk, sheet of paper IV Procedure Organization: 6A Teachers activities Warm- up Review of set a) Ss read symbols ,, , , Read symbols : 2.Give some examples using above Exercise 168 ( P 66 Textbook) Fill suitable symbols ,, , , Students activities Ss exercise 168 textbook into box Ê Z; 0Ê N; 3,275 ÊN; N Ê Z=N ; N Ê Z Exercise 170 ( P 67 Textbook) Find the intersection of set C of even numbers and set L of odd numbers Do explain! T request Sts work in group for Ss: The the intersection of set C of even numbers and set L of odd numbers is the empty set Because there isnt any number which is both even number and odd numbers Ss work in group a) Đúng True b)Đúng True c)Sai False d)Đúng True e)Sai False f)Đúng True gGV gọi đại diện nhóm lên trình bày True or false problem N a) b) (3-7) Z c) Z d) N* e)Ư(5) Z B(5) = f) ƯCLN(a,b) ƯC(a,b) với a,b N Review Review rules of divisibility by 2;3;5;9 T ask Sts answer question P 66 Ss express rules of divisibility by 2;3;5;9.) Express the rules of divisibility by 2;3;5;9 Ss answer all questions and exercises Which numbers are divisible by both and 5? Give an example Which numbers are divisible by all ;3;5 and 9? Give an example Exercise 1: Replace sign * by a digit to have following numbers a) 6*2 divisible by but not by b) *53* divisible by all 2;3;5;9 c) *7* divisible by 15 Exercise a)Chứng tỏ tổng số tự nhiên liên tiếp số chia hết cho Prove that sum of three consecutive natural numbers is the number divisible by b) Chứng tỏ tổng số có chữ số số gồm chữ số viết theo thứ tự ngợc lại số chia hết cho 11 Prove that sum of a number with two digits and that number which is written reverse is the number divisible by 11 Review prime numbers, composite numbers, common divisors, common multiples T request Ss answer question P 66 The similarity: Which is similar and different between the Prime numbers and composite numbers are natural definition of prime numbers and composite numbers greater than numbers? Is the product of two prime numbers prime number or composite number? What is the GCD of two or more numbers? What is the LCM of two or more numbers? Exercise Find natural number x, such that: The difference: A prime number has only two divisors which are and itself A composite number has more than two divisors The product of two prime numbers composite number Ss answer like textbook a)70 x;84 x and x>8 b)x 12;x 25;x 30 and 0