Sixty-six flash cards, eight to a sheet, one for every subtraction fact within 10, from 0 − 0 to 10 − 10, in order of the number taken from. Each front shows a fact stacked as in a column; its back shows the difference, with the fact printed small in the corner for sorting. Print the pack double-sided and flip on the long edge: each back sheet is laid out mirrored, so every card's back lands behind its front. On a printer that prints one side, choose Fronts only under Print, put the printed sheets back in the paper tray, then choose Backs only. Fronts have a thick frame and backs a thin one, so a card turned the wrong way stands out.
Show a card and ask for the answer, then for the addition fact that goes with it: 9 − 4 = 5 because 4 + 5 = 9. Partners take turns showing and answering, turning each card over to check. Pull the facts a child misses into a practice pile.
Go through a handful of cards a day rather than the whole set. Put the facts your child knows in one pile and the rest in another, and watch the second pile shrink.
This pack supports the following Common Core State Standards for Mathematics:
© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
Flash cards for every subtraction fact within 10, with the fact on the front and its difference on the back. Children say each answer, then turn the card over to check.
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