2.3 Estimating Products and Quotients

272 X 5=

• 1,000
• 1,300
• 1,500
• 1,200

Tags

CCSS.4.NBT.B.5

1,056 X 6=

• 12,000
• 8,000
• 7,000
• 6,000

Tags

CCSS.4.NBT.B.5

4,876 X 9=

• 45,000
• 4,500
• 36,000
• 3,600

Tags

CCSS.4.NBT.B.5

Sam was buying extra pencils. He bought 27 packs with each pack having 43 pencils in it. Which expression shows about how many pencils he bought?

• 30 x 20
• 40 x 30
• 20 x 40
• 20 x 50

Tags

CCSS.4.NBT.B.5

CCSS.4.OA.A.2

Jerry had 92 music albums on his computer. If each album was 34 minutes long, which expression shows about how many minutes of music he had?

• 90 x 30
• 100 x 40
• 90 x 40
• 100 x 30

Tags

CCSS.5.NBT.B.5

CCSS.5.OA.A.2

187 / 4 =

• 100 
• 50
• 5000
• 2

Tags

CCSS.5.NBT.B.6

CCSS.6.NS.B.2

Estimate the product of 99 X 7

• 70
• 700
• 7,000
• 7

Tags

CCSS.4.NBT.B.5

Why do we estimate numbers?

• We estimate because our math teachers say so.
• Estimating is on the STAAR test.
• Estimating makes math calculations easier.
• We estimate because it makes math more difficult.

Tags

CCSS.5.NBT.A.4

CCSS.5.NF.A.2

77.9 x 5.3

• 390
• 400
• 385

0.67 x 4.5 

• 0
• 4
• 5