Unit 5 Rational Number Arithmetic

2.3 + (-2.3) is equal to zero.

• True

• False

Tags

CCSS.7.NS.A.1B

(-3.7) + (-4.1) is positive.

• True

• False

Tags

CCSS.7.NS.A.1C

 $-2.6-\left(-\frac{12}{4}\right)$  is positive.

• True

• False

Tags

CCSS.7.NS.A.1C

 $\frac{5}{2}+\left(-2.5\right)$  is negative.

• True

• False

Tags

CCSS.7.NS.A.1C

72 - (-100) is negative.

• True

• False

Tags

CCSS.7.NS.A.1C

A heron is perched in a tree 50 feet above sea level. Directly below the heron, a pelican is flying 17 feet above sea level. Select the true statement(s):

• The difference in height between the pelican and the heron is -33 feet.

• The difference in height between the pelican and the heron is 33 feet.

• The distance between the heights of the pelican and heron is -33 feet.

Answer explanation

One statement is true.

Tags

CCSS.7.NS.A.1C

A pelican is flying 17 feet above sea level. Directly below is a trout, swimming 23 feet below sea level. Select the true statement(s):

• The difference in height between the pelican and the trout is -40 feet.

• The difference in height between the pelican and the trout is 40 feet.

• The distance between the heights of the pelican and trout is 40 feet.

Answer explanation

Two statements are true.

Tags

CCSS.7.NS.A.1C

Let  $x=-\frac{11}{8}$  and  $y=-\frac{11}{4}$  .
Which expression has a negative value?

•  $x+y$  

•  $x-y$  

•  $x\cdot y$  

•  $\frac{x}{y}$  

Tags

CCSS.7.EE.B.3

 $\left(-8\right)\cdot\frac{2}{3}$  

•  $\frac{16}{3}$  

•  $-\frac{16}{3}$  

•  $\frac{10}{3}$  

•  $-\frac{10}{3}$  

•  $-\frac{6}{3}$  

Tags

CCSS.7.NS.A.2A

 $\left(-8\right)\cdot\left(-\frac{2}{3}\right)$  

•  $\frac{16}{3}$  

•  $-\frac{16}{3}$  

•  $\frac{10}{3}$  

•  $-\frac{10}{3}$  

•  $-\frac{6}{3}$  

Tags

CCSS.7.NS.A.2A