1.6 Estimate Decimal Sums and Differences

Multi-Step

Marco has room for 15 more minutes of songs on his mp3 player. He has three songs to upload with the following lengths: 5.15 minutes, 3.8 minutes, and 4.4 minutes. After uploading all three songs, about how many minutes will he have left?

• 3 minutes

• 1 minute

• 2 minutes

• 0 minutes

Tags

CCSS.5.NBT.B.7

Connect Geoff and Andrea want to combine their money to buy pizza. Geoff has $5.95. Andrea has $8.30. Which benchmarks should they use to estimate the money they have?

• $6.00 + $8.25

• $5.75 + $8.00

• $6.00 + $8.50

• $5.00 + $8.00

Tags

CCSS.5.NBT.B.7

CCSS.5.NBT.A.4

Multi-Step Maiko wrote two songs. The first song was 2.9 minutes long. Then he added 0.4 minute. The second song was 5.6 minutes long. Then he subtracted 1.1 minutes from it. Use benchmarks to estimate the length of each song.

• first song: 2.5 minutes, second song: 4 minutes

• first song: 3.5 minutes, second song: 4.5 minutes

• first song: 3.5 minutes, second song: 7 minutes

• first song: 2.5 minutes, second song: 5.5 minutes

Tags

CCSS.5.NBT.B.7

CCSS.5.NBT.A.4

CCSS.5.NBT.A.3

Fran bought sneakers for $54.26 and a shirt for $34.34. If Fran started with $100, about how much money does she have left? A B C D

• $35

• $20

• $5

• $80

Tags

CCSS.5.NBT.B.7

Li is running a race around the school track. He runs 0.327 km during the first half of the race. What is the distance that he travels in the first half of the race, rounded to the nearest hundredth?

Tags

CCSS.5.NBT.A.4

A video lasts 6.44 minutes. About how long does the video last, rounded to the nearest minute?

Tags

CCSS.5.NBT.A.4

Dylan wants to buy a book for $16.95 and a magazine for $4.50. About how much will he need to buy the items without having to round down to the nearest benchmark?

• $15

• $30

• $25

• $20

Tags

CCSS.5.NBT.B.7

Sasha downloads a song that is 4.32 minutes long and one that is 8.28 minutes long. About how many minutes will it take all of her songs to play if she already has 13.8 minutes of songs?

• 15 minutes

• 30 minutes

• 20 minutes

• 26 minutes

Tags

CCSS.5.NBT.B.7

CCSS.5.NBT.A.3

Mike spends $23.40 on a present for his mom and a $18.95 on a present for his dad. If Mike started with $75, about how much money does he have left? A B C D

• $30

• $50

• $20

• $40

Tags

CCSS.5.NBT.B.7

to buy a soccer ball. Danielle has $7.95. Raj has $6.35. Which benchmarks should they use to estimate the money they have?

• $7.75 + $6.50

• $8.00 + $6.25

• $7.50 + $6.50

• $6.00 + $6.50

Tags

CCSS.3.OA.D.8