dividing numbers (web-based)
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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
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