How to use a tens fact to find the difference for 15-8

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asked Mar 13, 2017 146k views

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Atomless · Answer 1 · 2017-03-18T12:34:01+0000

well 15 minus 8 is 7 so the tens fact for example 8-3 is 5 just as 5+3 is 8 or like how 7+3 is 10 and 10-7=3 . that is the tens fact, so 15-8 is 7 and 7+8 is 15

How to use a tens fact to find the difference for 15-8

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