4 x 0.8 = 3.2
Close to what it should be
You use compatible numbers.
precision
It is extremely important, because everyone(including me) makes simple mistakes and sometimes needs to check.
56x34
precision * * * * * For reasonableness you only use estimation.
4 x 0.8 = 3.2
Close to what it should be
You use compatible numbers.
precision
It is extremely important, because everyone(including me) makes simple mistakes and sometimes needs to check.
With multiplication.....
Multiplication
you could have done something wrong on the calculator !
so when you find your answer you can check it by using multiplication.
multiplication is the Inverse operationof division so it could be used to check my work