Mid-Topic 1 Quiz math 7

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A diver is 12 meters below the surface of the water. Use an integer to represent how far the diver will need to travel to reach the surface. The integer that represents how far the diver will need to travel is ______.

One day John, who lives on the 9th floor, then went down 5 floors to visit a friend. What integer represents the change in the floor level from John's apartment?

3. Select all the sums that are positive:

• -8 + (-1)

• 7 + (-3)

• -4 +6

• 0 + (-8)

• -3 +8

5. The temperature in Washington, was -5°C in the morning. After a snowstorm, the temperature dropped 7 degrees. What was the temperature after the snowstorm?

7. A toy submarine is 15 feet below the surface of the lake. John dives down and brings the submarine back to the surface. What integer represents the submarine's final position with respect to the surface of the water?

7. Jennifer borrows $4.25 from her brother to buy a book. Later, she borrows $2.50 from her friend to buy a snack. Choose an equation to express Jennifer's total debt that day.

• $4.25 + (–$2.50) = $1.75

• –$4.25 + $2.50 = –$1.75

• –$4.25 + (–$2.50) = –$6.75

• $4.25 + $2.50 = $6.75

8. The temperature at a mountain peak is 2°F at sunrise. The temperature falls 7°F by sunset. What is the temperature at sunset?

8. Hannah says that 2.66 is a rational number. Gus says that 2.66 is a repeating decimal. Who is correct and why?

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8. The temperature in a city is 15.2°F during the day and -4.3°F at night. What is the difference in the temperatures?