Mathematics 5 curriculum guide 2015 I table of contents acknowledgements

48 ÷ 8 64 ÷ 8 40 ÷ 8 72 ÷ 8 32 ÷ 8 56 ÷ 8 
63 ÷ 9 45 ÷ 9 81 ÷ 9 54 ÷ 9 72 ÷ 9 36 ÷ 9 

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MATHEMATICS 5 CURRICULUM GUIDE 2015
Specific Outcomes
DIVISION 
Suggestions for Teaching and Learning
Students will be expected to:
Number
5N2 Use estimation strategies, 
including:
• front-end estimation
• compensation
• compatible numbers
• rounding
 in problem-solving contexts.
[C,CN, ME, PS, R, V]
To estimate products and quotients, students should know 
multiplication and division facts as well as how to multiply and divide 
with multiples of 10, 100, 1 000…
Ask students:
Why is estimation a valuable skill?
Possible points include:
• Estimation enables us to judge the reasonableness of an answer
acquired using pencil and paper or calculators.
• It can be done quickly using tools which are always readily available. 
• An estimation is often all that is required to make an important
decision.
Using prior knowledge, students can discuss real life situations 
where they have used (or could use) estimation strategies to find an 
approximate answer using division.
Achievement Indicator:
5N2.6 Select and use an 
estimation strategy for a given 
problem.
There is no one correct strategy or answer in estimating. 
Some strategies for estimating dividends include:
• Round one or both numbers to the nearest multiple of 10, 100 or
1000, e.g., 829 ÷ 4 = 800 ÷ 4 = 200
• Round numbers so that familiar facts can be used, e.g., 643 ÷ 8 =
640 ÷ 8 = 80
• Round both numbers, e.g., 372 ÷ 9 = 400 ÷ 10 = 4
Focus on helping students see what happens when: 
437 ÷ 9 
450 ÷ 9 [about 50]
437 ÷ 9 
500 ÷ 10 [about 50]
437 ÷ 9 
400 ÷ 8 [about 50]
Discuss why each change in the dividend and divisor makes sense.
5N2. 4 Apply front-end 
estimation to find:
• sums
• differences
• products
• quotients
Remind students that when using front-end estimation, only the first 
digit of the dividend is considered and the rest of the digits become zero. 
476 ÷ 5, for example, would be 400 ÷ 5 = 80. 
Students should remember that with front-end estimation, the estimate 
will always be less than the actual answer.

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