✏️ Estimating Decimals 3.2

Which one will provide the closest benchmark estimation for 22.99 x 2.98?

• 22 x 3 = 66

• 22 x 2 = 44

• 23 x 2 = 46

• 23 x 3 = 69

Answer explanation

22.97 is closer to 23 than 22.

2.98 is closer to 3 than 2.

To get the closest estimate you should multiply 23 x 3 to get 69.

The actual answer is 68.5 so 69 is a good estimate.

Tags

CCSS.5.NBT.B.7

Which one will provide the closest benchmark estimation for 1.59 x 13.27?

• 2 x 14 = 28

• 1 x 13 = 13

• 2 x 13 = 26

• 1 x 14 = 14

Answer explanation

1.59 is closer to 2 than 1.

13.27 is closer to 13 than 14.

To get the closest estimate you should multiply 2 x 13 to get 26.

The actual answer is 21.0993 so 26 is a good estimate.

Tags

CCSS.5.NBT.B.7

Tags

CCSS.5.NBT.B.7

Which one will provide the closest benchmark estimation for 3.23 x 8.54?

• 4 x 8 = 32

• 3 x 9 = 27

• 3 x 8 = 24

• 4 x 9 = 36

Answer explanation

3.21 x 8.54 = 27.5842

3.21 is closer to 3 than 4.

8.54 is closer to 9 than 8.

3 x 9 = 27 which is a good estimate.

Tags

CCSS.5.NBT.B.7

Which question it be most appropriate to use front-end estimation to get the closest estimate?

• 4.06 x 8.1

• 4.58 x 8.66

• 3.56 x 8.25

• 4.99 x 9.11

Answer explanation

Front-end estimation works best when the decimal portion of the number is less than half.

Tags

CCSS.5.NBT.B.7

Barry paid $29.85 for 3 tickets to the Jazz Festival. Estimate the cost for 1 ticket.

Tags

CCSS.5.NBT.B.7

Estimate the product of 3.8 x 5 using benchmark estimation.

Tags

CCSS.5.NBT.B.7

Tags

CCSS.5.NBT.B.7

A pair of ice cleats for ice fishing costs $9.89. About how much will 6 pairs cost?

Tags

CCSS.5.NBT.B.7

Fifteen players from the Royal Wildcats went to buy lunch together and spent $152.25. About how much money did the team spend on lunch for each player?