Question

B Reading Choose the best estimate for the multiplication problem below. 85 x 86

A. 8100
B. 10,400
C. 12,200​

Answer 1

A. 8100

Explanation:

85 x 86

To estimate, we multiply 85*100, which is the easiest multiplication, as a multiplication by 100 is the same as placing two zeros at the end of the number.

85*100 = 8500

Since 86 < 100, 85*86 < 8500. Thus, the correct estimate is given by option A.