The altitude of Lagos Island in Nigeria is $-\frac{1}{5}$ m. The altitude of Kristianstad in Sweden is $-2\frac{2}{5}$  m. How much higher is Lagos Island than Kristianstad?

____ m.

One morning, the temperature was -9°F. It later rose by 8°F. What was the temperature after the rise?

______ °F.

Mercury melts at -38.8 °C. Lead melts at 327.5 °C. How much higher the melting temperature of lead is than that of mercury?

_____ °C.

Charmaine is playing a video game. In the first round she gained 3 points, while in the second round she lost 7 points. What was her total score after playing for two rounds?

_____ points.

Lena had $20 in her account at the beginning of the week. On Monday, she spent $10. On Tuesday, she deposited some money and her balance became $14. How much money did Lena deposit on Tuesday?

______ $.

One morning, the temperature dropped 8 degrees from 6°F. What was the temperature after the drop?

______ °F.

Salt water freezes at about -3.25°C. Fresh water freezes at 0°C. Coconut oil freezes at 25.1°C. If the current temperature is at the freezing point for coconut oil, how many

degrees must the temperature drop for salt water to freeze?

_____ °C.

The altitude of a plane changed by –540 feet in 3 minutes, and then changed by 540 feet the following 3 minutes. What was the net change in the altitude of the plane during this 6-minute period?

____ feet.

Sarah scored 200 points in a game while Lena scored -280 points. How much lower was Lena’s score than Sarah’s? 

______ Points.

. The temperature in the Sahara Desert reaches a minimum of -5°C and a maximum of 55.4°C. What is the difference between the high and low temperatures in the Sahara Desert? 

______ °C.