6th Grade Math Textbook, Progress

Make a tableto record the hourly temperature change.

When the temperature drops, use a negative integer.

When the temperature rises, use a positive integer.

Work backward to check. Subtract 
3° (or add 3°) and add 
5°.

(
11°) 
(3°) 
(3°) 
(3°) 
(3°) 
(
5°) 
(
5°) 
(
5°) 
14°

The outside temperature at 11:00 P.M. is 14°F.

The weather forecaster predicts that it will

drop 5° each hour. Then the temperature will

rise 3° each hour after 2 A.M. What will the

temperature be at 6:00 A.M.?

Problem-Solving Strategy:

Make a Table

5-10

Complete the table.

Add 5° (or subtract 5°) for each hour until 2:00 A.M.

Add 3° for each hour until 6:00 A.M.

Visualize yourself in the problem above as

you reread it. List the facts and the question.

Facts: At 11:00 P.M. the temperature

is 14°F.

The temperature drops 5° each

hour until 2:00 A.M.

The temperature rises 3° each

hour after 2:00 A.M.

Question:What will the temperature be at 6:00 A.M.?

Time 11:00 12:00 1:00 2:00 3:00 4:00 5:00 6:00

Temperature 
14° 
9° 
4° 1° 
2° 
5° 
8° 
11°

 5  5  5 
 3 
 3 
 3 
 3

At 6:00 A.M. the temperature will be 11°F.

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