Rational Number Operations

What is the simplified value of the expression below?

• -78.12

• -1.97

• 1.97

• 78.12

What is the quotient of 9.18 divided by –3.4?

• -2.7

• -0.27

• 0.27

• 2.7

A student has $78 in his checking account. If the student spends $12 on lunch, which number could be combined with the amount left in the account to make zero?

• –90

• –78

• –66

• –12

Candice and Chris run a relay race at recess. Candice runs 1 ⅓ of a lap around the track. Chris runs ½ of a lap around the track. How much farther does Candice run than Chris?

• ⅚ laps

• ⅔ laps

• ¾ laps

• ⅙ laps

Tina lives 2 ¼ miles from the library. Sonya lives 3 ½ miles from the library. How much further does Sonya live than Tina?

• 1 ½ miles

• 1 ¼ miles

• ¾ miles

• ⅔ miles

-2 + 4 

• -2

• 2

• 0

• -4

-9 + (-5)

• -14

• 14

• -4

-7 - 2

• -9

• 9

• 5

• -5

44/-4=

• -11

• 11

• 176

• -176

7.9 + 18.72

• 2662

• 26.62

• 1

• 25.62