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Strategic Solving Part I

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Purpose

These exercises and activities are for students to use independently of the teacher to practise number properties.

Achievement Objectives
NA3-1: Use a range of additive and simple multiplicative strategies with whole numbers, fractions, decimals, and percentages.
AO elaboration and other teaching resources
NA3-6: Record and interpret additive and simple multiplicative strategies, using words, diagrams, and symbols, with an understanding of equality.
AO elaboration and other teaching resources
Specific Learning Outcomes

write family of facts based on a given equation

choose a strategy to solve addition and subtraction problems

Description of Mathematics

Addition and Subtraction, AA (Stage 6)

Required Resource Materials
Practice exercises with answers (PDF or Word)
Activity

Prior knowledge

Use a range of number strategies for solving addition and subtraction problems with whole numbers.
Write families of facts for addition.
Have an understanding of = sign.

Background

By rearranging equations it may be easier to find a solution to the equation. Students need a clear understanding of equality to rearrnge equations correctly.  This activity gives students the opportunity to revise mental strategies.

Comments on the Exercises

Exercise 1:
Asks students to revise the different ways a number fact with three numbers can be recorded to find a form that enables x to be easily calculated.

Exercise 2:
Asks students to rearrange an equation containing x , and then explain the strategy to calcualte x.

Homework Exercises

Exercise 3. This could be used as homework. It asks students to solve word problems.

Related Resources

These exercises and activities follow from the AA teaching episodes from Book 5 and are for those students who are able to use the number properties of addition and subtraction.

Attachments
StrategicSolvingPart1.pdf148.2 KB
StrategicSolvingPart1.doc291 KB
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Level Three