Adding Integers Math 324

Rules for Adding Integers

100

Adding a negative integer plus another negative always equals...

A negative integer

200

Adding a positive integer plus a another positive integer always equals...

A positive integer

300

True or False: A positive integer plus a negative integer will always equal a negative integer.

False: The outcome depends on the values of the integers

Flash Cards

100

4+5=

9

200

-4+5=

1

300

4+ -5=

-1

400

-4 + -5

-9

Word Problems

100

 A football team loses 5 yards on one play and then loses 8 yards on the next play.  How many yards did they lose on the two plays?

-13 

They lost 13 yards.

-5 + -8 = -13

200

You park in a garage 3 floors below ground level. Then you get in the elevator and go up 12 floors. What floor do you get off the elevator?

9th floor

-3 +12= 9

300

A submarine at 21 feet below sea level suddenly moves up about 6 feet.  At what depth is the submarine located now?

- 15 feet, or 15 feet below sea level

-21+ 6= -15