Estimate These Calculations

Question 1:

0.0286×0.45

0.015

Question 2:

3.98×0.051

0.2

Question 3:

0.0464 0.11

0.5

Question 4:

6.333 0.16

30

Question 5:

8.38×5.12 0.39

100

Question 6:

4.23×2.02 0.49

16