Rounding and Estimating products

When you see the word ABOUT in math, you know to . . . ?

• add

• subtract

• estimate

• guess

Tags

CCSS.4.MD.A.2

CCSS.4.OA.A.3

Round to estimate: 272 X 5=

• 1,000

• 1,300

• 1,500

• 1,200

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CCSS.4.NBT.A.3

CCSS.4.NBT.B.5

What is 56 rounded to the nearest ten?

• 40

• 70

• 50

• 60

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CCSS.4.NBT.A.3

CCSS.3.NBT.A.1

Estimate the product of 99 X 7

• 70
• 700
• 7,000
• 7

Tags

CCSS.4.NBT.A.1

CCSS.4.NBT.B.5

If you are estimating (by rounding to a place value) 92 x 12, which expression would be best to use?

• 100 x 20

• 100 x 30

• 90 x 12

• 90 x 10

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CCSS.4.NBT.A.3

CCSS.4.NBT.B.5

Estimate the product using compatible numbers.

24×37

• 24x37=888

• 30x40=1,200

• 25x40=1,000

• 20x30=600

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CCSS.4.NBT.A.3

CCSS.4.NBT.B.5

CCSS.4.OA.A.3

Mason swims about 55 minutes each day. Estimate the

number of minutes he swims in 14 days.

• 60x10=600 minutes

• 50x10=500 minutes

• 60x20=1,200 minutes

• 50x20=1,000 minutes

Tags

CCSS.4.MD.A.2

CCSS.4.NBT.B.5

CCSS.4.OA.A.2

24×18 ROUNDS to: (rounding is to a place value)

• 30x20=600

• 20x20=400

• 20x10=200

• 30x10=300

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CCSS.4.NBT.A.3

CCSS.4.NBT.B.5

Estimate the product using COMPATIBLE NUMBERS.

52×27

• 50x25=1,250

• 50x20=1,000

• 52x27=1,404

• 60x30=1,800

Tags

CCSS.4.NBT.B.5

Round to estimate the product.

45×48

• 2,000

• 2,500

• 1,600

• 2,160

Tags

CCSS.4.NBT.A.3

CCSS.4.OA.A.3