Estimating Decimals

Before it erupted on May 18th 1980 Mount St. Helens was 9,677.25 feet tall. After the eruption Mount St. Helens was 8,365.73 feet tall. About how much taller was Mount St. Helens before it erupted?

• 1300 ft

• 18,000 ft

• 900 ft

• 20,000 ft

Tags

CCSS.5.NBT.B.7

Maria ran 1.89 miles on Monday and 2.08 miles on Tuesday. On Wednesday , Maria ran twice as many miles as she ran on Monday. Approximately how many miles did Maria run on Monday, Tuesday, and Wednesday combined? Choose the best estimate.

• 3 miles

• 6 miles

• 8 miles

• 4 miles

Tags

CCSS.5.NBT.A.3

CCSS.5.NBT.A.4

CCSS.5.NBT.B.7

Each month Ramona´s dad pays $19.95 for internet service. So far this year, he has spent $179.55 on internet service. Which is the best estimate of the number of months Ramona's dad has paid for internet service this year?

• 5 months

• 11 months

• 12 months

• 9 months

Tags

CCSS.5.NBT.B.7

Ms. Allen purchased a car for $18,799. The original price of the car was $2,799 more than Ms. Allen´s purchase price. Which is the best estimate of the original price of the car?

• $21,000

• $22,000

• $25,000

• $26,000

Tags

CCSS.8.NS.A.2

Kisha is decorating a gingerbread house. She spends $11.39 for 6.2 pounds of candy. Which is the best estimate of the cost of each pound of candy?

• $20

• $1

• $2

• $5

Tags

CCSS.5.NBT.B.7

Midge held the school high jump record for 344 weeks. Which is the best estimate of the number of ears Midge held the record?

***There are 52 weeks in a year***

• 1 year

• 3 years

• 5 years

• 7 years

Tags

CCSS.5.NBT.B.7

The 22 students in Mrs. Sorenson´s class bought a Valentines´s present for their teacher. They purchased 2 dozen roses for $22.95 per dozen and a box of chocolates for $13.45. They agreed to split the cost equally. What is the best estimate of the amount each student paid?

• $3

• $2

• $5

• $4

Tags

CCSS.5.NBT.B.7

Choose the correct estimation of the difference

34.84 - 15.09

• 34 - 15 = 19

• 35 - 16 = 19

• 34 - 16 = 18

• 35 - 15 = 20

Tags

CCSS.5.NBT.A.4

CCSS.5.NBT.B.7

Estimate:
8.2 + 7.8

• 17
• 15
• 16
• 19

Tags

CCSS.5.NBT.A.4

CCSS.5.NBT.B.7

Estimate.  $3.52-$1.54

• About $6
• About $2
• About $0
• About $3.50

Tags

CCSS.5.NBT.A.4

CCSS.5.NBT.B.7