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Number (add/sub)
Use rounding to estimate solutions for addition and subtraction
Add and subtract large numbers I
Lesson
Practice
Add and subtract large numbers II
Addition and subtraction problems involving angles
Mixed additions
Mixed subtractions
Addition and Subtraction with an Abacus (Investigation)
Rewriting addition problems
Rewriting subtraction problems
Properties of addition and subtraction
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Hong Kong
Stage 2

Add and subtract large numbers I

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