Estimate These Calculations

Question 1:

5.02×6.21

30

Question 2:

4.12×0.489

2

Question 3:

20.19 0.22

100

Question 4:

3.701 0.44

10

Question 5:

2.43×2.28 0.12

40

Question 6:

2.59×63.7 0.16

900