pptx, 599.93 KB
pptx, 599.93 KB
This method helps students to use negative numbers to solve written and mental subtraction problems and encourages mental calculation as a preferred method.
Tes classic free licence

Review

4

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owenelton

11 years ago
4

I really like this approach; none of that fiddly crossing-numbers-out-and-borrowing-from-the-next-column. Thanks for sharing.

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