Question

Explain how you can use mental math to compare 7 pounds to 120 ounces.

Answer 1

16 ounces in a pound.
120/16 = 60/8 = 30/4 = 15/2 = 7.5

7.5 lbs = 120 oz
7.5 lbs > 7 lbs

Answer 2

1 pound is equal to 16 ounces.

7 * 16 = 112

So 7 pounds is equal to 112 ounces.

Therefore 120 ounces is greater than 7 pounds.