Problem

In some calculations a combination of mental math and a calculator is most appropriate. Fo...

In some calculations a combination of mental math and a calculator is most appropriate. For example, because

we can calculate 97 146 on a calculator and then mentally multiply by 1000. Show how to calculate each of the following using a combination of mental math and a calculator:

a. 19 5 194 2

b. 379 4 193 25

c. 8 481 73 125

d. 374 200 893 50

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