7.NS.3 — Rational Numbers in the Real World

Read each problem carefully, show your work, and write your answer with its unit.

1. 1.The temperature in Anchorage was -14.5°F in the morning. By noon it had risen 8.75°F, and by evening it dropped 12.25°F. What was the temperature in the evening?
2. 2.Maria owes her friend $23.50. She earns $15.75 babysitting and uses all of it to pay back part of her debt. How much does she still owe?
3. 3.A submarine was at -240 feet. It rose 3/4 of that distance toward the surface. What is the submarine's new depth?
4. 4.Jake's bank account balance was -$45.20. He deposited $120.00 and then spent $67.89 on groceries. What is his new balance?
5. 5.A recipe calls for 2 1/4 cups of flour per batch. If Sofia wants to make 3 1/2 batches, how many cups of flour does she need?
6. 6.The temperature changed by -3.6°F each hour for 5.5 hours. What was the total change in temperature?
7. 7.A football team gained 6 1/2 yards on the first play, lost 3 3/4 yards on the second play, and gained 2 1/4 yards on the third play. What was the total yardage change after three plays?
8. 8.Carlos drove from his home to the city, which is 84.6 miles away. He drove 1/3 of the distance before stopping for gas. How many miles does he still need to drive?
9. 9.A scientist recorded the following temperature readings (in °C) over four days: -6.2, 4.8, -3.5, and 1.1. What was the average daily temperature?
10. 10.Lena had $52.40 in her account. She made three equal withdrawals of $18.75 each. What is her account balance after the withdrawals?
11. 11.A deep-sea fish swam from -320 feet to -185 feet. How many feet did the fish rise?
12. 12.A store marked down all prices by 1/5. If a jacket originally cost $87.50, how much does the jacket cost after the markdown?
13. 13.Ethan hiked up a mountain gaining 2,150 feet in elevation over 6.5 hours. What was his average elevation gain per hour? Round to the nearest hundredth.
14. 14.The water level in a reservoir dropped 0.75 feet per day for 8 days and then rose 1.25 feet per day for 3 days. What was the total change in water level?
15. 15.Priya scored -3 1/2 points on a penalty in a trivia game, then earned 7 3/4 points on the next question, and lost 2 1/4 points on a penalty. What is her total score for those three rounds?
16. 16.A scuba diver descended at a rate of -4.5 meters per minute. After 6.4 minutes, how deep is the diver?
17. 17.Alex borrowed $120 from his parents. He paid back 3/8 of the debt in the first month and 1/4 of the debt in the second month. How much does he still owe?
18. 18.A stock lost $2.35 per share on Monday, gained $1.80 per share on Tuesday, and lost $0.95 per share on Wednesday. If Mia owns 40 shares, what is the total change in the value of her investment?
19. 19.A chef has 15 3/4 pounds of ground beef. He uses 2 1/8 pounds for each meatloaf. How many complete meatloaves can he make, and how much beef is left over?
20. 20.On a winter night, the temperature was -8.4°F. The next morning it was -22.9°F. How many degrees did the temperature drop overnight?
21. 21.A city's budget had a surplus of $4,500,000. The city spent $6,750,000 on road repairs and received a state grant of $1,250,000. What is the new budget balance?
22. 22.Rosa swam 3/4 of a mile each session for 5 sessions, and then 1 1/2 miles each session for 3 sessions. How many total miles did she swim?