Powers of 10's and Estimating with Multiplicaiton

13 x _________ = 13,000

• 10

• 100

• 1000

• 10000

Nellie says that 60 x 1,000 is 6,000 because there are three zeros in 1,000. Kara says that 60 x 1,000 = 60,000. Who is correct?

• Nellie

• Kara

• Both

_______ = 382 x 10⁴

• 3820

• 38200

• 382000

• 3820000

Which would result in the largest answer?

• 60 x 10⁶

• 60 x 10²

• 60 x 10⁴

• 60 x 10³

_______ = 10³ X 80

• 80

• 800

• 8000

• 80000

Which expression is greater?

• 93 x 10³

• 11 x 10⁴

Which is equivalent to multiplying a number by 10⁴ ?

• multiplying by 40

• multiplying by 100

• multiplying by 1,000

• multiplying by 10,000

Is 500 over or under or exactly the estimate of 12 times 53?

• Over

• Exactly 500

• Under

Which does NOT show a reasonable estimate of 24 x 338? (which one is too big)

• 6000

• 7000

• 7500

• 10000

Lance has 102 packages of sports cards. Each package has 28 cards. Use rounding to estimate. About how many cards does Lance have?

• 2000

• 2500

• 3000

• 3500