Review operations with Rational Numbers

Chris decided to do his history homework a little bit each night. On the first night he did 1/5 of the homework, the second night he completed 1/4 of the homework, and the third night he worked 1/2 of the homework. How much of the homework has Chris completed?

• 19/20 or .95

• 1/2 or .5

• 1/3 or .33

• 1/10 or .1

Jonah had $340.87 in his checking account. He withdrew $52 and wrote a check for $18.72. Find the new balance.

• $270.15
• $411.59
• $374.15
• $307.59

 A girl's hair is 12 3/8 inches long. If she has 2 1/2 inches cut off, how long will her hair be?

• 10 1/4 inches
• 10 3/16 inches
• 9 7/8 inches
• 10 7/8 inches

Audrey paid $13.95 for a box of birthday invitations and $0.52 each for 12 stamps. What was the total Audrey paid for the notes and stamps?