Why does the fact family for 81 and 9 have only two number sentences

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asked Apr 1, 2018 101k views

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BoeseB · Answer 1 · 2018-04-07T06:24:27+0000

Because there are only two things you can do with these two " family" members. 81 divided by 9 is 9. 9 times 9 is 81. Strictly speaking, there should be three in the family: 9,9 and 81 9 is the square root of 81. 81 is the 9 squared.

Why does the fact family for 81 and 9 have only two number sentences

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