Adding and Subtracting Negative Numbers with Temperature and Elevation

A meteorologist was monitoring the temperature outside in degrees Fahrenheit and wrote the expression 78+(−6)−5. Which statement best describes this expression?

• The temperature started at  78∘F and increased by  6∘F. Then the temperature decreased by  5∘F.

• The temperature started at  78∘F and increased by  6∘F. Then the temperature increased by  5∘F.

• The temperature started at  78∘F and decreased by  6∘F. Then the temperature decreased by  5∘F.

• The temperature started at  78∘F and decreased by  6∘F. Then the temperature increased by 5∘F.

-21.52-(-8.86)

• 12.66

• 30.38

• -30.38

• -12.66

Geographers use negative numbers to represent points below sea level and positive numbers to represent points above sea level. A penguin dove 3.5 meters below sea level to catch dinner for his kids, who are sitting on an iceberg 1/2​ of a meter above sea level.

What is the difference in elevation between the penguin and his kids?

• 1 meter

• 2 meters

• 3 meters

• 4 meters

10+(-12)-(-13)

• -15

• 10

• 11

• 0

Which of the following can help you when adding integers?

• Keep, Change, Reciprocal

• Same signs add and different signs subtract.

• Keep, change, opposite

• Draw a line, change the sign.

What is the value of the expression -18 - (-44) ?

• -62

• - 26

• 62

• 26

• - 414 feet

• - 412 feet

• 414 feet

A hot air balloon ascends to a height of 45 meters after launch. To avoid a tree, the hot air balloon flew up by 4 1/2 meters. After some time, the balloon's altitude began to change by -2 1/4 meters every minute for 8 minutes. What is the new altitude of the hot air balloon?  Enter your answer as a decimal or an improper fraction.  DO NOT enter a mixed number.  Only enter a numeric answer;Do not add any words or measurements.

At sunrise on Tuesday, the temperature in Detroit, Michigan was -4 degrees Fahrenheit. The temperature at sunrise on Tuesday in Fairbanks, Alaska was 3 times colder than it was in Detroit. What was the temperature in Fairbanks, Alaska at sunrise? It was ________ degrees Fahrenheit.

(Only enter a numeric answer. DO NOT enter any words.)

When you add integers with the same sign, what do you do? 

• (+) and keep the sign

• (-) and keep the sign of the larger

• (x) and keep the sign

• (-) and keep the sign of the smaller