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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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Q: How can you use addition to check division?
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Related questions

How do you check addition with division?

You don't. You can check addition with subtraction or subtraction with addition, since subtraction is the opposite of addition. Similary, you can check division with multiplication, or vice versa.

What is the abacus use for?

addition subtraction multiplication and division

Why do you check addition with subtraction?

to ensure and re-check your work you use the opposite signs (addition & subtractions, multiplication & division) e.g. __= blank 10+ _ = 12 _=2 to check: you take the answer (in this case 12) and subtract (because its the opposite of addition) by the blank you filled in (2 in this case. therefore, 12-2=10 so we know its correct :-)

How do you solve multi step equations?

Solving • Work backward to isolate the variable and solve the equation.Multi-Step • Use subtraction to undo addition, and use addition to undo subtraction.Equations • Use multiplication to undo division, and use division to undo multiplication.

Why you can use multiplication to check a division problem?

multiplication is the Inverse operationof division so it could be used to check my work

What are the four operations in math that you mostly use?

Addition + Subtraction - Multiplication * Division /

Does addition or division come first?


What did the Chinese use their number system for?

For calculations such as addition, subtraction, multiplication and division .... etc....

What are the four fundamental operations use in math?

Addition, subtraction, multiplication, and division.

How do you check my math solution twice when there's an equals sign?

It depends whether it is a subtraction, mulitplication, addition, or division problem.

How could you use addition subtraction division and multiplication of integers outside the classroom?

When you do your homework at home.

Which to operations are done first division or subtraction or multiplacation or addition?

Do (multiplication/division) before you do (addition/subtraction).