Estimating and Multiplication

Using estimation, 36 x 69 is closest to...

• 1800

• 2800

• 2400

• 1200

Using estimation, 76 x 34 is closest to...

• 2,400

• 240

• 1,100

• 2,100

Which is the best estimate for 49 x 27?

• 1,500

• 150

• 1,000

• 100

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

Isabelle has 6 ant farms. Each ant farm has 89 ants. Which of the following shows a reasonable estimate of how many ants Isabelle has?

• 7x125=875

• 8x110=880

• 6x90=540

• 10x100=100

Round to the nearest ten to estimate:

37 x 41

• 40 x 40 = 1600

• 30 x 40= 1200

• 35 x 50 = 1750

The closest 100 to the number 397 is...

• 400

• 200

• 100

• 300

Which is used to estimate?

401 x 89

• not this one

• 400 x 80

• 400 x 90

Which is used to estimate?

788 x 41

• 800 x 40

• 700 x 40

• not this one

Michael is 8 years old. If he multiplies his age by four and adds 9, that is the age of his uncle. How old is Michael's uncle?

• 32

• 17

• 21

• 41