Question

2). Estimate the product. Round each factor to the nearest ten. then multiply.

32 X 79 =

95 X 24 =

71 X 48 =

89 X 50 =

21 X 16 =

99 X 91 =

Answer 1

So for the first one, you'd round round 32 down to 30, and 79 up to 80. The new equation is 30×80. 3×8=24, then add the zeroes to make 2400. For the second one, round 95 up to 100, and 24 down to 20. 20×100=2000. The third 71 to 70, 48 to 50. 70×50=3500. The fourth, 89 to 90, 50 stays the same, 90×50=4500. Fifth, 21 to 20, 16 to 20, 20×20=400. Sixth 99 to 100, 91 to 90, 100×90=9000.

1: 2400

2:2000

3:3500

4: 4500

5: 400

6: 9000