Adding and subtracting decimal numbers

What is a reasonable estimate of the sum of 15.66 and 9.88?

• 50

• 26

• 6

• .23

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

*BONUS QUESTION*

38.7+81.2+18.4

ROUND ALL

• 39

• 81

• 18

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Miley said when she estimated 789.67 and 234.19 to the nearest PLACE VALUE she got 700 and 200. Is Miley correct YES or NO.

TYPE YES OR NO for your answer.

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

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. Estimate (round to the nearest dollar) how much money they each have.

• $6.00 + $8.25

• $5.75 + $8.00

• $6.00 + $8.50

• $5.00 + $8.00

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate 54.23 - 2.39

• about 50

• about 48

• about 56

• about 52

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate the sum.

2.7 + 3.8 =

• 7

• 20

• 5

• 10

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Ronnie spent $142.75 on groceries, $40.99 on dog food, and $9.62 dog toys. Estimate the total Ronnie spent. What is your estimate?

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate the sum using COMPATIBLE NUMBERS:

741.26 + 103.75

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate the total weight of two boxes that weigh 9.4 lb and

62.6 lb using rounding and compatible numbers.

• 72 lbs

• 70 lbs

• 69 lbs

• 71 lbs

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CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate the sum of 35.89 and 22.14

• 58

• 56

• 57

• 59

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7