Integers and Their Opposites

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CCSS.7.NS.A.1C

Trevor spent $27 and now has no money left. How much money did he have before his purchase?

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CCSS.3.OA.D.8

A scuba diver rose 600 feet to the surface of the water. The integer that represents the diver’s position, in feet, with respect to the water’s surface before rising is ___

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CCSS.6.NS.C.5

A diver is 19 meters below the surface of the water. Use an integer to represent how far the diver will need to travel to reach the surface.

• 19

• -19

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CCSS.6.NS.C.5

An elevator goes up 7 floors and then down 4 floors. What integer represents the overall change in the floor level from where it started?

• 3

• -3

• 11

• -11

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CCSS.6.NS.C.5

How do you know what the opposite of a nonzero number is?

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CCSS.6.NS.C.6A

Sean is exploring a coral reef 91 feet below sea level and Liz is hiking 91 feet above sea level. Who is farther away from sea level?

• Sean is farther away from sea level.

• Liz is farther away from sea level.

• Neither; they are the same distance away from sea level.

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CCSS.6.NS.C.7A

CCSS.6.NS.C.7B

Which situation can be represented by the opposite of -7?

• You take an elevator down 7 floors.

• You take an elevator up 7 floors.

• The temperature drops 7°C.

• A stock decreases 7 points.

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CCSS.6.NS.C.5

A submarine is underwater. Its position is 645 feet below sea level. It rises in the water 100 feet and then descends 100 feet. What integer represents the change in the submarine’s position in the water?

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CCSS.7.NS.A.1A

Select all of the following situations that could be represented by the equation 5 + (-5) = 0.

• Your starting account balance is $0, you deposit $5

• The temperature rises 5°F, then drops 5°F.

• The temperature is 0°F, then it drops 5°F

• You walk up 5 stairs, then you walk down 5 stairs.

• You walk up 5 stairs, then you walk up 5 more stairs.

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CCSS.7.NS.A.1B