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Difference DemonstratorThe Equal Addition MethodI made this resource after reading the wonderful Compendium of Mathematical Methods by Jo Morgan.
A tool for modelling subtraction as difference, but also for modelling how you can simplify a subtraction calculation by adjusting both the minuend and the subtrahend by the same amount. e.g. 67 - 43 Add 3 to both (using your bonds of ten) 70 - 46 ... a much easier calculation in your head. Things that you can move:
Have fun! |
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