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.

7.13 x -5.5

• -39.215

• 3.9215

• 3921.5

• -392.15

-1.2 x -3.4

• 40.8

• 4.08

• -4.8

• -4.08

(-8.6)(-0.07)

• -0.62

• 0.602

• -0.602

• 6.02

10.3 x 2

• 20.46

• 2.06

• 20.6

• 204.6

(2.5)(-1.2)

• 3.7

• -3

• -3.7

• 3

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

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

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

• 18.474

• 184.74

• 1840

• 1.8474