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3 years ago

5

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

2 answers:

Julli [10]3 years ago

8 0

It only has two number sentences because 81 divided by anything else wont work only 9 would. Also since 9 times 9 is equal to 81

Phoenix [80]3 years ago

5 0

<span>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 9 squared.</span>

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