Which context describes a difference of rational numbers? Choose the correct answer.

Question

finding the average of daily high temperatures
finding the average of daily high temperatures

determining the coldest temperature in a month
determining the coldest temperature in a month

recording the temperature hourly
recording the temperature hourly

comparing the daily high temperature and low temperature

Answer 1

comparing the daily high temperature and low temperature

Answer 2

Which scenario about books represents finding the difference? Choose the correct answer.

finding the type of books in a store
finding the type of books in a store

finding the location of a book in a store
finding the location of a book in a store

finding the total number of books in a store when new books arrive
finding the total number of books in a store when new books arrive

finding the number of books remaining after a sale on books

Answer 3

finding the number of books remaining after a sale on books

Answer 4

The temperature on Monday is −4°C. On Tuesday, it is 13° colder. What is the temperature on Tuesday? Choose the correct answer.

17°C

−17°C

9°C

−9°C

Answer 5

The temperature on Tuesday is −4°C + (-13°C) = -17°C. Therefore, the correct answer is −17°C.

Answer 6

Ping dove off a 10 meter platform. He reached a depth of 6 meters in the water. What was the change in height? Choose the correct answer

4 meters
4 meters

60 meters
60 meters

16 meters
16 meters

64 meters

Answer 7

The change in height can be calculated by subtracting the depth from the initial height. In this case, the change in height would be 10 meters - 6 meters = 4 meters. Therefore, the correct answer is 4 meters.

Answer 8

A parasail is 1/20 of a meter above the water. Then, after 10 minutes, the parasail is 1/50 of a meter above the water. What is the change in height? Choose the correct answer. (As in fractions)

7/100 meter

1/50 meter

3/100 meter

1/20 meter

Answer 9

The change in height can be calculated by subtracting the initial height from the final height.

The initial height is 1/20 of a meter and the final height is 1/50 of a meter.

To subtract fractions, we need a common denominator. The least common multiple of 20 and 50 is 100.

Converting both fractions to have a denominator of 100:

1/20 = 5/100
1/50 = 2/100

Now, subtracting the fractions:

5/100 - 2/100 = 3/100

Therefore, the correct answer is 3/100 meter.