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.
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.
they use addition, subtraction, division, and multiplication
it is called strategy and it means what you use as in multiplication,division,addition,and subtraction.
For calculations such as addition, subtraction, multiplication and division .... etc....
Addition, subtraction, multiplication, and division.
It depends whether it is a subtraction, mulitplication, addition, or division problem.
Lets say its 50-45=5. To check it, use the opposite sign. To check it would be the answer plus the bottom number. So 5+45=50. Or vice versa if it was a addition problem. If it was a division problem check would be multi. multi. problem would check divi.
Do (multiplication/division) before you do (addition/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 :-)
When you do your homework at home.
The operation is P.E.M.D.A.S., and each letter stands for an operation to use. P - parentheses, E - exponents, M - multiplication, D - division (multiplication and division are equal...so it doesn't matter which direction it is in. This is the same for addition and subtraction), A - addition, S - subtraction. I hope this helped :-)
Solving this equation for x actually requires subtraction and division rather than addition and division.
Subtraction is used to check addition.
An operation on a series of numbers is when you use amongst others addition, subtraction, multiplication and division. Mathematics decided the order of operations is to work out the sums in the brackets first, then exponents, then multiplications and division and finally addition and subtraction.
Addition is the opposite of subtraction. For example, 24 - 9 = 15. If you want to check your answer, add 9 + 15. It equals 24, so your answer is correct.
Use BIDMAS meaning order of operations are brackets, indices, division, multiplication, addition and subtraction
Multiplication is successive Addition Division is successive subtraction
u can go plus pluse pluse
For multiplication/division, use the least number of significant figures (ie 6.24 * 2.0 = 12). For addition subtraction, use the least specific number (ie 28.24 - 2.1 = 26.1)
The associative property does not apply to division but multiplication and addition do.
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.
Addition and multiplication
multiplication is the Inverse operationof division so it could be used to check my work