Multiplying Rational Numbers (+/-)

(-4.2)(-5)

• 21

• -21

• -9.2

• -1.2

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

(2.5)(-1.2)

• -3.7

• 3.7

• 3

• -3

Tags

CCSS.7.NS.A.2A

 $-\frac{1}{3}\times\frac{2}{5}$  

•  $-\frac{3}{8}$  

•  $\frac{2}{15}$  

•  $-\frac{2}{15}$  

•  $-\frac{1}{15}$  

 $\frac{2}{3}\times\left(-6\right)$  

• 4

• -4

•  $\frac{4}{3}$  

•  $-\frac{4}{3}$  

(-3.9) x (-2.8)

• 1.092

• -1.092

• -10.92

• 10.92

Tags

CCSS.7.NS.A.2A

Find the product.
 $-\frac{2}{3}\times12$  

• 4

• -6

• -8

• -24

(-0.2)(-0.8)

• 16

• 0.16

• 0.016

• 1.6

Tags

CCSS.6.NS.B.3

 $-\frac{3}{8}\times\frac{4}{5}$  

•  $\frac{3}{10}$  

•  $-\frac{3}{10}$  

•  $\frac{1}{10}$  

•  $-\frac{5}{6}$  

A bath tub drains at a constant rate. The amount of water changes by -0.75 gallons in one minute. What is the change in the amount of water in the bathtub after 5 minutes?

• -3.75 gallons

• 375 gallons

• -0.15 gallons

• -37.5 gallons

Tags

CCSS.7.NS.A.3

The amount of shore at a beach changes an average of $-\frac{3}{4}$  feet each year. What is the amount of shore after 7 years?

•  $5\ \frac{1}{4}$  

•  $\frac{3}{28}$  

•  $-\frac{3}{28}$  

•  $-5\ \frac{1}{4}$