Multiplying & Dividing Rational Decimals Review

When MULTIPLYING DECIMALS, count the number of digits after the decimal in each factor and

• Subtract

• Find the square root

• put the same number of digits in front of the decimal in the product.

• put the same number of digits behind the decimal in the product.

Tags

CCSS.5.NBT.B.7

7.13 x -5.5

• -39.215

• 3.9215

• 3921.5

• -392.15

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CCSS.7.NS.A.2A

-1.2 x -3.4

• 40.8

• 4.08

• -4.8

• -4.08

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CCSS.7.NS.A.2A

(-8.6)(-0.07)

• -0.62

• 0.602

• -0.602

• 6.02

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CCSS.7.NS.A.2A

10.3 x 2

• 20.46

• 2.06

• 20.6

• 204.6

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CCSS.6.NS.B.3

(2.5)(-1.2)

• 3.7

• -3

• -3.7

• 3

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CCSS.7.NS.A.2A

What is the correct location of the decimal point in the product?

2.39 x 4.37 = 104443

• 10.4443

• 104.443

• 1.04443

• 10444.3

Tags

CCSS.6.NS.B.3

Sarah bought 2.5 yards of fabric to make a patchwork quilt. If the fabric was on sale for $6.20 per yard, how much did Sarah spend?

• $15.50

• $15.65

• $1.55

• $155

Tags

CCSS.7.EE.B.3

When dividing decimals,

• square the answer

• multiply

• move the decimal over in the divisor, over the same amount in the dividend, and put it up in the answer

• subtract

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CCSS.5.NBT.B.6

CCSS.6.NS.B.2

• 18.474

• 184.74

• 1840

• 1.8474

Tags

CCSS.6.NS.B.3