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 Teacher illustrates pupils the definition of division (recall back their schemata). Teacher shows division by sharing equally and grouping. Teacher instructs pupils to do the activity and activity 2. Teacher facilitates pupils.

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

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

………… in Number sentence ÷ =

Check answer by MULTIPLICATION X =

Example: 12 ÷ 6 = 2 b) Grouping

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

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 DIVIDE VARIABLES FACT FAMILY INVERSE QUOTIENT EXPRESSION DIVIDEND DIVISOR PRODUCT ARRAY MULTIPLY FACTORS

Activity 2 : DIVISIBILITY RULES 5, 6 and 9

A number is divisible by: IF…… The sum of the umber’s digits is 9 9 The number is also divisible by 2 and 3 6 The number ends in 0 or 5 5

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 YES 250 What is the last digit? 0

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 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 YES 258 Is the number divisible by 2 and 3 ?

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

Try this number: 246 41 6 246 - 24 06 - 6 0

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

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

Dividing Numbers (web-based)

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Dividing Numbers (web-based)