Dividing Numbers (web-based)

Dividing Numbers

Prepared by Abdul Hadi

TOPIC: DIVISION

• Year: 3• Learning Objectives:

- To understand division as sharing equally or grouping.- To write number sentences and standard written form for division.- To divide numbers within 5, 6 and 9

times- table

Procedures

1) Teacher illustrates pupils the definition of division (recall back their schemata).

2) Teacher shows division by sharing equally and grouping.

3) Teacher instructs pupils to do the activity and activity 2.

4) Teacher facilitates pupils.

Mathematics = elementary arithmetic

What is DIVISION?

Division is an arithmetic operation

which is the inverse of multiplication.

Example:a) Sharing equally

14 ice- creams are shared equally between 7 girls.

14

7

Therefore, each girl gets…

…………in Number sentence

÷ =

Check answer by MULTIPLICATION

X =

b) GroupingExample:

12 ÷ 6 = 2

In standard written form…….

2 6 12 -12 0

Activity 1: WORD SEARCH

CLUES

1. Helena wants to __ the cookies equally among her friends.2. Letters or symbols that stand for unknown numbers are __.3. A set of related multiplication and division number sentences is called a __.4. Multiplication and division are opposite, or __ operations.5. The answer to a division problem is the __.6. 12 ÷ 6 is an example of an __.7. The __ is the number that is being divided in a division problem.8. The number that divides the dividend is the __.9. Multiply two factors to find the __.10. Tiles arranged in rows and columns are an __.11. When groups have the same number of items, you can __ to find out how many there are in all.12. Numbers that you multiply are __.

WORD LIST

DIVIDEVARIABLES

FACT FAMILYINVERSE

QUOTIENTEXPRESSION

DIVIDENDDIVISOR

PRODUCTARRAY

MULTIPLYFACTORS

Activity 2: DIVISIBILITY RULES

5, 6 and 9

A number is divisible by:IF……

5 The number ends in 0 or 5

6 The number is also divisible by 2 and 3

9 The sum of the umber’s digits is 9

Dividing by 5RULE: If a number ends in 0 or 5 then the

number is divisible by 5

50

5 250

-25

000

0

0

What is the last digit?

0YES

250

Try this number: 75

15

5 75 -5

25 -25

0

Try this number: 362

72

5 362 - 35

12 - 10 2 remainder

Dividing by 6RULE: If a number is divisible by 2 and 3,

then it is also divisible by 6 43

6 258

-24

18

-18

0

Is the numberdivisible by

2 and 3?

YES

258

6 127 -12 17 - 12 5 remainder

Try this number: 127

22

Try this number: 246

41 6 246

- 24 06

- 6 0

Dividing by 9RULE: If the sum of the digits is 9, then the

number is divisible by 9 25

9 225

-18

45

-45

0

Sum of thedigits:

2+2+5=9YES

225

Try this number: 621

69 9 621

- 54 81

- 81 0

Try this number: 563

62 9 563

- 54 23

- 18 5 remainder

Link to other website

• http://www.playkidsgames.com/mathGames.htm

• http://www.321know.com/div.htm

• http://oswego.org/ocsd-web/games/mathmagician/mathsdiv.htm

• http://www.quia.com/jg/65651.htm

• http://www.gamequarium.com/math.htm