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