Estimate Division Using Compatible Numbers

When estimating with division, you should

• find compatible numbers closest to the original numbers and divide

• Round to the nearest ten and divide no matter what

• just divide

• ?

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5.3.A

When estimating 372 divided by 41, it should be changed to

• 400 divided by 40

• 360 divided by 40

• 370 divided by 50

• 300 divided by 50

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5.3.A

Which division problem shows the best way to estimate 711 ÷ 6 using compatible numbers?

• 700 ÷ 10

• 700 ÷ 6

• 720 ÷ 6

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5.3.A

Which division problem shows the best way to estimate 19 ÷ 3 using compatible numbers?

• 20 ÷ 3

• 18 ÷ 3

• 20 ÷ 5

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5.3.A

Compatible numbers are:

• Fake numbers

• Numbers you make up

• Numbers that help make math easier and are friendly

• Numbers that hold hands

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5.3.A

Erin has 598 goldfish to split between 22 fish tanks. About how many goldfish are in each tank? Choose the best answer

• 3 goldfish in each tank

• 20 goldfish in each tank

• 12 goldfish in each tank

• 30 goldfish in each tank

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5.3.A

Which division problem shows the best way to estimate 351 ÷ 9 using compatible numbers?

• 360 ÷ 9

• 300 ÷ 10

• 320 ÷ 9

Which division problem shows the best way to estimate 39 ÷ 5 using compatible numbers?

• 40 ÷ 5

• 36 ÷ 6

• 35 ÷ 5

Which division problem shows the best way to estimate 62 ÷ 8 using compatible numbers?

• 60 ÷ 10

• 64 ÷ 8

• 60 ÷ 8

Which division problem shows the best way to estimate 4193 ÷ 7 using compatible numbers?

• 4200 ÷ 7

• 4000 ÷ 10

• 4200 ÷ 10