Adding Integers

Front

4 + (-5)

Back

-1

Front

-3 + (-7)

Back

-10

Front

-9 + (-5)

Back

-14

Front

10 + (-4) = ?

Back

6

Front

-14 + (-3)

Back

-17

Front

-8 + 20

Back

12

Front

2 + (-21)

Back

-19

Front

Addition equation for the model: -2 + -4 = -6, 2 + -4 = -2, 4 + 2 = 6, -2 + -4 = 6

Back

2 + -4 = -2

Front

Equation for 2-color counters:

Back

4 + (-5) = -1

Front

Addition expression for the number line problem.

Back

-4 + 7