Subtracting Integers

Vocab

100

Absolute Value

The distance of a number from zero

200

Integer

The set of whole numbers and their opposites.

300

Opposite

The opposite of a number is the same distance from zero as the original number just on the other side.

400

|-6|

Absolute value of -6 = 6

500

6 and -6

Opposites

Subtracting Integers

100

-4 - 6

-10

200

4 - 11

-7

300

15 - (-7)

22

400

-27 - (-3)

-24

500

-59 - (-115)

56

Subtracting Integers Word Problems

100

If it is 5º outside and the temperature will drop 17º in the next six hours, how cold will it get?  Write a subtraction sentence and then solve using Keep-Change-Change.

-12

200

Josie has $47 left on her checking account.  If she writes a check for $55, what will Josie’s balance be?  Write a subtraction sentence and then solve using Keep-Change-Change.

-8 dollars

300

It will be – 12º tonight.  The weatherman predicts it will be 25º colder by noon tomorrow.  What will the temperature be by noon tomorrow?  Write a subtraction sentence and then solve using Keep-Change-Change.

-37 degrees

400

A scuba diver swam 96 feet beneath the surface of the lake.  He then descends 49 feet.  What is his depth now?  Write a subtraction sentence and then solve using Keep-Change-Change.

-145 feet or 145 feet below the surface

500

The freezing point of water is 32º F.  Tim added potassium and found out that the freezing point went down by 8º F.  What was the freezing  point of the water with the added potassium?  Write as a subtraction sentence and then solve using Keep-Change-Change.

24 degrees F