Read and analyze the problem carefully.
Gisele was asked to estimate the product of 28.4 and 3.2. Which of the following 1. numbers did she use to get a reasonable estimate and multiply mentally?
A. 5 x 300= 1 500
B. 30 x 30 = 900
C. 30 x 3=90
D. 20 x 3 = 60

2. Use estimation to choose the reasonable product for 9.6 x 5.4 =N
A. 5
B. 50
C. 500
D. 5 000

3.Loiss multiplied 7.70 x 96.8 to find the product. Use estimation to determine which of the following number is reasonable.
A. 8
B. 80
C. 800
D. 8 000

4. Round each factor to the greatest value and the product of 199.9 x 15.8 =
A. 40 000
B. 4 000
C. 400
D. 40

5. Use estimation to determine which answer to 487.3 x 22.3 = reasonable.
A. 10 000
B. 1000
C. 100
D. 10