Additive Inverse
What is the additive inverse of 7?
-7
Evaluate: 5 + (–3)
2
Evaluate: 3/4 + 1/4
1
Evaluate: 6 × (–4)
-24
Evaluate: 2/3 × (–9)
-6
The additive inverse of -15 is _______.
15
Evaluate: –12 – (–7)
-5
Evaluate: –5.2 + 3.7
-1.5
Evaluate: –42 ÷ 7
-6
Evaluate: –12 ÷ (3/4)
-16
Which number is the additive inverse of 3/4?
-3/4
The temperature was 8°F in the morning. By evening, it had dropped 15 degrees. What is the temperature now?
-7°F
A recipe calls for 2 ½ cups of sugar. Sarah only has 1 ¾ cups. How much more sugar does she need?
3/4 cup
The temperature drops 5 degrees each hour for 6 hours. What is the total temperature change?
-30 degrees
Evaluate: –1.2 × 2.5
-3.0
True or False: A number plus its additive inverse always equals 1.
False: It always equals 0.
Maria had a balance of $25 in her account. She bought lunch for $12 and then deposited $30. What is her new balance?
$43
The temperature was –4.5°C in the morning. By the afternoon, it rose by 7.25°C. What was the afternoon temperature?
2.75°C
A scuba diver descends at a rate of –12 feet per minute. How far will the diver descend in 9 minutes?
-108 feet
A piece of ribbon is 6 ¾ feet long. If each craft project uses 1 ½ feet of ribbon, how many projects can be made?
4 ½ projects → realistically 4 full projects
If the additive inverse of a number is -9.25, what is the original number?
9.25
A diver is at –35 feet below sea level. He rises 18 feet, then dives down 22 more feet. What is his final position relative to sea level?
-39 feet
During a football game, a team gains 8 ⅔ yards on the first play, then loses 12 ¼ yards on the next play. What is the total yardage change after both plays?
–3 7/12 yards
A submarine is –360 feet below sea level. If it rises steadily at a rate of 45 feet per minute, how many minutes will it take to reach sea level?
8 minutes
The temperature on Mars is about –67.5°F. If a scientist records the temperature over 2.4 Martian days (sols), what is the total change if the temperature remains constant?
-162°F