dividing-numbers with three digit-webbased1216.pdf

division

1. Dividing Numbers
Prepared by Abdul Hadi

2. 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

3. 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.

4. Mathematics =
elementary arithmetic
What is DIVISION?
Division is an
arithmetic operation
which is the inverse of
multiplication.

5. Example:
a) Sharing equally
14 ice- creams are shared
equally between 7 girls.
14
7

6. Therefore, each girl gets…

7. …………in Number sentence
÷ =

8. Check answer
by MULtiPLiCatiON


X =

9. b) GroupingExample:
12 ÷ 6 = 2

10. In standard written form…….
2
6 12
-12
0

11. Activity 1: WORD sEaRCh

12. 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 __.

13. WORD LIST
DIVIDE
VARIABLES
FACT FAMILY
INVERSE
QUOTIENT
EXPRESSION
DIVIDEND
DIVISOR
PRODUCT
ARRAY
MULTIPLY
FACTORS

14. Activity 2: DiVisiBiLitY
RULEs
5, 6 and 9

15. A number is divisible by:
iF……
The sum of the
umber’s digits is 9 9
The number is also
divisible by 2 and 36
The number ends
in 0 or 5
5

16. DiViDiNg BY 5
RULE: 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?
0
YES
250

17. Try this number: 75
15
5 75
-5
25
-25
0

18. Try this number: 362
72
5 362
- 35
12
- 10
2 remainder

19. DiViDiNg BY 6
RULE: 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 number
divisible by
2 and 3?
YES
258

20. 6 127
-12
17
- 12
5 remainder
Try this number: 127
22

21. Try this number: 246
41

6 246
- 24
06
- 6
0

22. DiViDiNg BY 9
RULE: If the sum of the digits is 9, then the
number is divisible by 9
25
9 225
-18
45
-45
0

Sum of the
digits:
2+2+5=9YES
225

23. Try this number: 621
69

9 621
- 54
81
- 81
0

24. Try this number: 563
62

9 563
- 54
23
- 18
5 remainder

25. 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