martes, 5 de diciembre de 2017

Operations Games 9


https://www.mathplayground.com/puzzle_pics_subtraction_facts_to_20.html
Saulius put together a mathematical puzzle

"If you want to put together a picture correctly, you can not make a mistake in calculating it. However, when there are only a few details missing, you needn't count, because you can see where the details of the puzzle are :)"

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