Applying operations on rational numbers to solve mathematical and real-world problems

Bob bought a Ford Expedition for his family. After five years, the SUV was worth $10,000 less than what he paid for it. What integer represents how much value the SUV lost each year? 

• -$200
• -$2,000
• $2,000
• -$8,000

Mr. Howard lost money on his investments at a rate of $7 per day. What is the change in his investment at the end of a week?

• -$49.00

• $14.00

• $49.00

• -$14.00

Natalie is knitting a scarf that is currently 1.25 feet long. On Monday, she adds 0.55 feet to the length of the scarf. On Tuesday, Wednesday, and Thursday she adds 1.68 feet to the length of the scarf each day. She finishes the scarf on Friday by adding 0.76 feet to the length of the scarf. What is the length of the scarf, in feet, once Natalie finishes?

• 18 meters

• • - 18 meters

• 19 meters

• • - 19 meters

(9-5)×(15+8.03)-16

• 92.23

• 76.12

• 76.013

You should have answered -24 for the last problem. Remember, the original problem was -2 + 8 x -3. We multiplied 8 x -3 to get -24. Now we replace the 8 x -3 in the original problem with -24. So now we have -2 + -24. What does this equal?

• -22

• -26

• 22

• 26

In a race, the second place finisher crossed the finish line $1\ \frac{1}{3}$ minutes after the first place finisher. The third place finisher was $1\ \frac{3}{4}$ minutes behind the second place finisher. The third place finisher took $34\ \frac{2}{3}$ minutes. How long did the first place finisher take?

• The 1st place time was 31 min 45 sec.

• The 1st place time was 31 min 35 sec.

• The 1st place time was 31 min 25 sec.

• The 1st place time was 31 min 15 sec.

Spencer took $21 with him to the mall. At the music store he spent 2/3 of his money on a DVD. He spent 1/4 of what he had left on a drink. How much money did Spencer have left after he bought the drink?

• $6
• $14
• $5.25
• $0.75

Ms. Visceglie bought 2 ½ pounds of rainbow cookies. Her sister ate ¾ of a pound. Then, she went back to the store and bought 2 more pounds of rainbow cookies. How many pounds of rainbow cookies does Ms. Visceglie have now? 

• 3½ 
• 13½ 
• - 3½ 
• 2 ½ 

40 - 2⁴ + 8

• 40
• 32
• 24
• 42