Estimating Quotient

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 4000 ÷ 21

• 4000 ÷ 20

• 4200 ÷ 22

• 4250 ÷ 20

7.19 ÷ 58 ≈

• 12

• 1.2

• 0.12

• 0.012

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 660 ÷ 6

• 650 ÷ 6

• 640 ÷ 6

• 700 ÷ 6

79.2 ÷ 39 ≈

• 0.2

• 0.02

• 0.002

• 2

What would be an estimate of 65.23 / 8 ?

• 6

• 7

• 8

• 9

91.3 ÷ 42 ≈

• 0.2

• 0.02

• 0.002

• 2

9.13 ÷ 23 ≈

• 0.3

• 0.03

• 0.003

• 3

Estimate:
24.1 ÷ 8.3

• 5

• 3

• 6

Estimate : 
24.7 divided by 4.68

• 7

• 4

• 5

• 3

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 800 ÷ 9

• 840 ÷ 9

• 810 ÷ 9

• 830 ÷ 9