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81 is 72 more than 9

81 is 9 times 9

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13y ago

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

A fact family for 81 and 9 consists of addition and subtraction sentences that relate to those two numbers. Since 81 can be expressed as the product of 9 and another number (9 x 9 = 81), the fact family primarily focuses on these two operations. The only two number sentences are 9 + 9 = 81 and 81 - 9 = 9, reflecting the relationship without introducing additional numbers. Thus, the limited number of sentences is due to the specific values and their mathematical relationships.


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

IT does because the other two sentences are impossible.


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

It does because the other two sentences are impossible.


Why does the fact family for 81 and 9 have only two number sentences and how does this make a difference?

because you need 3 different numbers for 4 sentences


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

It has only 2 numbers: 9 and 81. Since 9 squared (9^2, 9*9). So all there is is:9 × 9 = 8181 = 9 × 9


Why does the fact family for 81 and 9 only have 2 number sentences?

awnow


What two number can you multiply to get 81?

9 and 9


What number mulplied by itself gives 81?

The two answers are -9 and +9.


What is the square root of this number 81?

The square root of 81 is 9. The square roots of 81 are 9 and -9.


Why is 81 an composite number?

Because it has more than two factors and it is also a square number in which 9 times 9 = 81


What is the square number of 81?

The square number of 81 is 9. 9 x 9 = 81


What is -81 over -9?

-81 over -9 simplifies to 9, as dividing two negative numbers results in a positive number. Specifically, -81 divided by -9 equals 9.