Estimate These Calculations

Question 1:

0.397×0.402

0.16

Question 2:

0.922×0.754

0.72

Question 3:

4.79 0.49

10

Question 4:

67.7 0.17

350

Question 5:

13.4×89.1 0.14

9000

Question 6:

50.6×3.84 0.54

400