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- Use with manipulatives, images and abstract notation, to create stories and explore problems involving addition and subtraction.
- As used by NCETM in their Mastery Professional Development materials on additive reasoning
- Also very useful for exploring the inverse nature of addition and subtraction, and for introducing ’empty box’ problems
- Dry-wipe surface for use with whiteboard pens.
- size 70 x 21cm
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