Operations with Rational Numbers

A team gains 20 yards.  Then they lose 7 yards.  Find the sum. 

• 13 yards
• 27 yards
• -13 yards 
• -27 yards 

A cyclist travesl downhill for 125 feet.  Then she travels up a hill 50 feet.  How far is the cyclist?

• -75 feet
• 175 feet
• 75 feet
• -25 feet 

Your checking account is overdrawn by $50.  You write a check for $20.  What is the balance in your account? 

• -$30
• $70
• -$70

Wai and Kuri were digging in the sand at the beach.  Wai dug a hole that was 15 inches below the surface and Kuri dug a hole that was 9 inches below the surface.  Find the difference in the depths of their holes.  

• 24 inches
• 6 inches
• -6 inches
• 20 inches 

A roller coaster begins at 90 feet above ground level.  Then, it descends 105 feet.  Find the height of the coaster after the first descent. 

• -15 feet
• 15 feet
• 195 feet
• 5 feet 

• 19

• -19

• 15

• -15

• 3

• -3

• 28

• -28

• 5

• -5

• -42

• 42

• 25

• -25

• 59

• -59

• -60

• 60

• 120

• -120