Estimate multiplication

Estimate the product 72 x 97.

• 6,300
• 8,000
• 7,000
• 6,400

Tags

CCSS.4.NBT.B.5

Which shows the best estimate to use for estimating 37 × 63?

• 40 × 70 = 2,800
• 50 × 60 =  3,000
• 40 × 60 =  2,400
• 30 × 60 =  1,800

Tags

CCSS.4.NBT.B.5

Each fifth grade class at Roy DeShane Elementary has 27 students.  There 5 fifth grade classes. (Let's pretend!)  What is the best estimate of the total amount of fifth grade students at Roy DeShane Elementary? 

• 20
• 30
• 100
• 150

Tags

CCSS.4.NBT.B.5

Multiplying is the same computation as

• repeated subtraction
• repeated addition
• diving each number by the number in front of it
• exponents

Tags

CCSS.4.NBT.B.5

Each ticket to a concert cost $32. What is the closest to the total cost of 409 tickets?

• 12,000
• 1,200
• 440
• 15,000

Tags

CCSS.4.NBT.B.5

27 x 10³

• 27,000
• 270
• 2,700
• 270,000

Tags

CCSS.5.NBT.A.2

Which shows the best estimate to use for estimating 37 × 63?

• 40 × 70 = 2,800
• 50 × 60 =  3,000
• 40 × 60 =  2,400
• 30 × 60 =  1,800

Tags

CCSS.4.NBT.B.5

Compatible numbers are:

• Fake numbers
• Numbers you make up
• Numbers that help make math easier and are friendly
• Numbers that hold hands

40 x 30 

• 1200
• 120
• 12
• 700

Tags

CCSS.4.NBT.B.5

30 x 60 

• 900
• 1800
• 180
• 18

Tags

CCSS.4.NBT.B.5