IRI Adventuring With Numbers - Grade 3 - Term 3

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OVERVIEW: TEACHER'S GUIDE FO R "Adventuringwith Numbers” GRADE 3 IRIMATHEMATICS - 16

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Lesson 93


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PART 2: THE AFTER-AUDIO PROGRAMME TEACHER: Facilitate the following activities 4900 5029 9602 - 2578 - 2486 - 4294

io min

Column Subtraction Teacher, after the Audio Programme, let the children solve the exercises which were dictated to them. (see box) Let them work by themselves but help those who may have difficulties. Length: Measuring in dm and cm 8 min Teacher, let a child stand with his/her arms stretched out in front of the chalkboard. From the string, cut to the length of the stretch. Show the class the cut out length of string. Have a child use a metre rule to measure the stretch in dm and cm. Let him tell the class the length of the stretch. Ask the class to write it. • Repeat using the stretch of another child. Ask the children to say, which of the two children has the longer stretch.

2 $10 coins

7 min Money — Coins and Bills: Equivalent Amounts. Draw on the chalkboard nine $1 coins, four $5 coins and two $10 coins as shown at left. • Tell this story: "Mary has nine $1 coins (point to the group of $1 coins on the chalkboard), four $5 coins (point to the group of $5 coins) and two $10 coins (point to the group of $10 coins). She wants to buy a mango for $35 and pay for it with the coins she has so that she does not receive change." Ask: "Can Mary pay for the mango with two $10 coins?" (No). Ask them, 'Why Mary cannot pay for the mango with two $10 coins?" (Two $10 coins will not give a total of $35). Ask: "Can Mary pay with two $10 coins and four $5 coins?" (No). Ask them, "Why Mary cannot pay for the mango with two $10 coins and four $5 coins?" (Two $10 coins and four $5 coins will not give a total of $35). • Ask the children, "Can Mary pay with five $1 coins, four $5 coins and one $10 coin?" (Yes). Ask them to say why Mary can pay with five $1 coins, four $5 coins and one $10 coin. (Five $1 coins, four $5 coins and one $10 coin will give a total of $35) or (2 $10 coins, 3$ 5 Coins) or (2 $10 Coins, 2 $5 Coins, 5 $1 Coins). Lesson 95

IRl Mathematics Grade 3 — "ADVENTURING WITH NUMBERS"

23


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Homework:

N.1■•■•1

Statistics: Sectors of a Circle

For the next lesson, have ready for each group a cardboard or paper cut-out of a circle.

Lesson 102


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0)

x I

ii 6

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cdo -Dth bo

+

+ +

Column Subtraction (exercisebook)

a)

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iv co co 6 6.)

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them to mix them up and

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schedule with the children.

07:00 - Has brea kfast 08:00 - Arr ives at sc hool 09:00 - Assembly 10:00 - Mathematics 11:00 - Social Studies


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Lesson 105


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Column Multiplication

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in their exercise books. Have the

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IRI Mathematics Grade 3 — "ADVENTURING WITH NUMBERS "


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Ora l Division (ora l) Successors and Predecessors

Addition ofFractions (exercise boo k) Oral Multiplication


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0

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a

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co _a

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2 x 10

cts

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0

8 x 10

4÷4 65

6÷ 4 1 x 10

(f)

7÷5 73

2 ÷2 7 x 10

3÷3 658

Mixed Numbers (exe rcise book) Column Division (ora l) ctions ok) Oral Division (ora l) Predecessors Ora l Multiplication & Successors (oral) (oral)

5 ÷4

3 x 10

0

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189

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PART 1: DURING THE AUDIO PROGRAMME


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C

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PART 2: THEAFTER-AUDIO PROGRAMME

Teacher, havereadytwosquaresof thesamesize foreach group. Ensurethat thechildren havetheirmultiplicationtables .

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LESSON 124 EFORE TH E MATHEMATICSCLASS

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IRIMathematicsG rade3 — "ADVE NTURING WIT HNUMBERS"

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Column Addition

Reading and Writing Numbers

Month 8 List of Topics (Lessons: 109 to 128 ) Predecessors ofd, cd, bc d. (2<d<9, c/=0). Successors ofd, cd, bcd. ( 1<d< 9, Successors ofd, cd, bed. ( 1<d<8, c/=0). Successors of a9, ab9, a09. Predecessors of a0, abO, a00. Predecessors of a l, abl, A01. Successors of abed (with zeros) ab00, a0b0. Compare a Joie withb/c; bie with a b/c. Compare a bie with b/c; bic with a bit, oral response, drawing, written. Compare a b/c with die, oral response, drawing, written. Compare mixed numbers with whde numbers. Compare unitary fractions.

Column addition, carry once, ab+c, abc+de, abc+d. Column addition, decimals, 3 c d Limns, one digit dec imal, carry one twice, left implicit zeros. Column addition, decimals carry 1 or 2 once to twice, 3-4 addends, left implicit zeros, one digit dec imal. Write numbers a0bc, a00c. Write numbers, a000. Write numbers, a0bc, a00e. Write numbers, 1000, 10ab, 100a. Write n umbers Ike, lab°, la0b. Write numbers, a andbc. Write mixed numbers, At* (1<a<a, b<c). Written mixed numbers, a bic ( 1<a<9, b<c).

Horizontal Division Fractions

OC

More, Compare a. b with c.d. Greater, Less, Greatest, Compare a with c.d 0=0). Compare a with c.d (d/=0). Least

M

Successors of a0, abO, a00.

(.1

Month 7 List of Topics (Lessons: 93-108)

OC

0

Numeration, Counting

O O

Ea MATHEMATICS CONTENT

Mixed numbers ab/c (1<a<9, b<c). Write mixed numbers, a d/c ( 1<a<a, b<c). Write mixed numbers, a We ( 1<a<9, b<c). Mixed numbers, a b/c, b<c, concept and vocabulary.

Horizontal division, use ta bles, up to 9x9. Concept of fractions 1/n (n, - 2,3,4,5).

IRI Mathematics Gra de 3 — "ADVENTURINGWITHNUMBERS"


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Oral Subtraction ab-c(c<b). Orsubtraction, Orsubtraction(M<10)(withzeros). Oral subtraction, M-b(M< 10)(with zeros). Orsubtraction, ab-cd (d<b). •

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0

Month 7 93-108) Listof Topics(Lessons:

o.. ,-5',..=a P .5 - •• _ _ -_ o_ =, _, -,--• _„ 0 __. =

aib+dd+clib(b = 2a10, 100). Additionof fractions , a bic+bic. Additionof fractions ,

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MATHEMATICS CONTENT Month 8 109to128) Listof Topics(Lessons:

Additionof fractions , Ab/c+bic. Additionof fractionsa bic+ d eic(b+e<c). Additionof fractions , a bic+ delc(b+e>c). alb-cib (a>b). S ubtractionof fractions, Subtractionof fractions, alb -clb (a>b).

,,S1391A111N H_LIAA ON11111N3ACIti„ - C ap eJo so!)ew alllelAl12:11


MATHEMATICS CONTENT

Month 7 List of Topics (Lessons: 93-108)

Month 8 List of Topics (Lessons: 109 to 128 )

Oral subtraction, M-b (M< 10) (with zeros). Oral subtraction, ab-a0.

Oral Division

Oral Multiplication

Column Multiplication

Column Division

RS (1)

Equivalence

Oral division, concept, quotient=0,1; divisor 1=1. Oral division, concept, quotient= 1. Oral division, quotient=0. Oral division, use of subtraction, large combinations Oral division, quotient1= 0,1 divisori=1. Oral division, quotient1=0, divisor 1=1.

Oral multiplication, memorize axb. Oral multiplication, memorize axb (a=0, 1..9, b=0, 1..9). Oral multiplication, concept of ax0.

Column multiplication, 2 columns, carry b (b> 1) one time. Column multiplication, 2 columns with zero in the multiplication, without carry. Column multiplication, 3 columns with zero in the multiplication, without carry. Column multiplication. 4 c dumns carry b (b> 1) once. Column multiplication. 4 cdumns carry b (b> 1) up to t hree times. Column multiplication, 3 columns, carry b (b> 1) up to 2 times.

Column division, complete algorithm (1,2):- (1)=(1)+R. Column division, (1,2):-(1) + R. Small combinations. Column division, ( 1,2):-(1)=(1). Column division, complete algorithm (1,2) :- ( 1)=( 1)+R, small combinations.

Oral division, concept of quotient1=0, 1, divisor 1= 1. Oral division, concept of quotient =1. Oral division, use tables up to 9x 9.

Oral multiplication, memorize axb (a=0, 1..9, b=0, 1..9). Oral multiplication, memorize axb Oral multiplication, ax 10. Oral multiplication, ax 10, 10xa. Oral multiplication, concept of ax0. Oral multiplication, memorize axb (a=0, 1..9; b=1). Oral multiplication, axbxc (axb<9)

Column multiplication, 2 columns, zero in multiplicand without carry. Column multiplication, 3 columns, zero in multiplicand without carry. Column multiplication, 3 columns, carry b (b>a) up to twice. Column multiplication, 4 columns, carry b (b>a) up to three times. Column multiplication, 4 columns, zero in the multiplicand without carry.

Column division, complete algorithm ( 1,2):-(1)=(1)+R. Small combinations. Column division, use tables up to 9x9. Column division, complete algorithm ( 1,2):-(1)=(1)+R, large combinations Column division, (1,2):-(1)=(1). Column division, (1,2):-(1)=(1),Iarge combinations. Column division, zero in the quotient.

Concept of area. Equivalence of a and a.0.

IRI Mathematics Gra de 3 — "ADVENTURING WITH NUMBERS"

Equivalence of a and a.0.


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Money: Coinsand Bills

Usingnetsof cylinderstomakecyl inders . Recognisingpropertiesof the triangle based pyramid. Calcul atingperimetersof quadril ateralsandpentagons . Measuringin dmandcm, inmand cm, incma nd mm. Meas uringtoshow that1/2litre= 500 ml. Howmany milliliters thereare in 1 litre, 11/2litres, 2 l itres, 2 1/2litres, 3 litres. Solveverbalproblems: Deciding howtosdve theprobleme.g. shouldweaddor subtract.

Equivalence: Verbal problems. e.gMary has 9 $1 coins, four$5 coinsandtwo$10coins. Shewants to buyamango for$35 andpay for itwith the coinsshe hasso thatshe doesnot receivechange. Identify anequivalentamount for$35 i ncoi ns. Readi ng bargraphs. Collecting information. Representinginformationonatable. Readi nga tableshowing i nformation.

IRI Mathematics Grade 3 — "ADVENTURING WITHNUMBERS"

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Month 7 (see IRIcalendar) Month8(see IR! calendar) Listof Topics(Lessons: 93to 108) Listof Topics(Lessons: 109 to 128) Division tabl es from division byoneuptodivisionby10. Multiplicationtablesup to 9 times. Horizontalmultiplication:axb \ cwherea, b, c 9. Col umnsubtraction: 4 cd umns: takefrom10 e.g. 2104 - 17 Columnsubtraction: decimals: 3 or 4 col umns: take fromb where e.g: 43.2 22.2 - 6.7 - 5.5

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Recognisingpropertiesofthesquarebasedpyramid.

Orderingcontainersaccordingtocapacity. Verbal problems involvingaddition, subtraction, multiplicationand division. Measuring inmillilitres. Solvi ngverbalproblems: e.g. shouldwemultiplyor divide. Stati ng if theanswer is l ess thanormore thanagivenunit.

Recognisingapiechart asshowi ng i nformation inacircle. Readingapiechart.

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MATHEMATICS CONTENT Computation



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