Complete each statement to describe a diagram that represents each situation. Then complete the addition expression to represent the final temperature. a. The temperature was 80° F and then fell 20° F.

A number line diagram with an arrow that starts at
, is
units long, and points to the left.
addition sentence:
+ (
)

b. The temperature was -13° F and then rose 9° F.

A number line diagram with an arrow that starts at
, is
units long, and points to the right.
addition sentence:
+

c. The temperature was -5° F and then fell 8° F.

A number line diagram with an arrow that starts at
, is
units long, and points to the left.
addition sentence:
+ (
)