Question

The product of which expression contains four decimal places?

5.3478 times 6.4214
6.4 times 9.1
521 times 3.82
14.2 times 0.784

Answer 1

the guy above is corect

Explanation:

Answer 2

14.2 times 0.784

Explanation:

When you check the numbers of digit after the decimal point; you get the idea.

For example; one digit is after the decimal point in 14.2

Three are after the decimal in 0.784;

Adding both 1 and 3 we get 4.

This smart observation when done for the other multiplied numbers do not give us 4.