Addition is Fun

Integers

100

4 + 5 = ?

9

200

-1 + 7 = ?

6

300

8 + (-3) = ?

5

400

-9 + (-2) = ?

-11

500

-10 + (-15) = ?

-25

Fractions

100

1/5 + 3/5 = ?

4/5

200

-1/9 + 2/9 = ?

1/9

300

Double Jeopardy!!

1/4 + 1/8 = ?

3/8

400

-5/6 + (-5/6) = ?

-10/6 or -5/3

500

-7/8 + 1/8 = ?

-6/8 or -3/4

Decimals

100

1.1 + 3.4 = ?

4.5

200

-6.5 + 1.2 = ?

-5.3

300

-7.8 + (-1.3) = ?

-9.1

400

115.8 + 23.1 = ?

138.9

500

-14.1 + 14 = ?

-0.1 or -.1

Rules

100

When BOTH of the signs are positive do we add or subtract?

Add

200

When BOTH signs are negative do we add or subtract?

Add

300

When the signs are different do we add or subtract?

Subtract

400

When the signs are different how do we find the sign for our answer?

We take the sign on the GREATER value

500

What do we have to have before we can add or subtract fractions?

Common/same denominators 

Mix Up

100

-1 + 6 = ?

5

200

1.3 + (-8.4) = ?

-7.1

300

-1/5 + 3/5 = ?

2/5

400

3/8 + 3/4 = ?

9/8

500

Double Jeopardy!!!

-100.5 + (-45.3) = ?

-145.8