Question

Chris estimated the product of 37 and 86 by multiplying 40x90.Tell how you know if this is greater than or less than the actual product.

Answer 1

Greater than the actual product because both numbers where rounded up to the closest tenth.

Explanation:

37 x 86 - original

40 x 90 - rounded

37 < 40 - greater than

86 < 90 - greater than

Checking --->

37 x 86 = 3182

40 x 90 = 3600

3182 < 3600