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How can you use addition to check division? - Answers

Well, the normal way to check a division problem is with multiplication... if you divide 21 by 7 and come up with three, then you check that by multiplying 7 and 3, to get 21. But if you're on an abacus or something, I suppose you could say, "I came up with a result of three, which means three sevens", and then add 7 + 7 + 7 to get 21.



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How can you use addition to check division? - Answers

https://math.answers.com/other-math/How_can_you_use_addition_to_check_division

Well, the normal way to check a division problem is with multiplication... if you divide 21 by 7 and come up with three, then you check that by multiplying 7 and 3, to get 21. But if you're on an abacus or something, I suppose you could say, "I came up with a result of three, which means three sevens", and then add 7 + 7 + 7 to get 21.



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https://math.answers.com/other-math/How_can_you_use_addition_to_check_division

How can you use addition to check division? - Answers

Well, the normal way to check a division problem is with multiplication... if you divide 21 by 7 and come up with three, then you check that by multiplying 7 and 3, to get 21. But if you're on an abacus or something, I suppose you could say, "I came up with a result of three, which means three sevens", and then add 7 + 7 + 7 to get 21.

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      Well, the normal way to check a division problem is with multiplication... if you divide 21 by 7 and come up with three, then you check that by multiplying 7 and 3, to get 21. But if you're on an abacus or something, I suppose you could say, "I came up with a result of three, which means three sevens", and then add 7 + 7 + 7 to get 21.

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