Easy Adding Integers

1 + 7 =

• 8

• -8

• 6

• -6

Adding Integers with the SAME SIGN is easy. For example, 5 + 2 = 7. When you add integers with the SAME SIGN, you simply ______________________________.

• Add the numbers and CHANGE the sign

• Add the numbers and KEEP the sign

Adding integers with DIFFERENT SIGNS is difficult. For example, 3 + (-1) = 2. You need to draw the POSITIVE & NEGATIVE COUNTERS, then cross out the _________________. The ANSWER is the number of leftovers with the associated sign.

• zero pairs

• ordered pairs

6 + 2 =

• -4

• 4

• 8

• -8

(-23) + 11 =

• -12

• 12

• -34

• 34

3 + (-63) =

• -60

• 60

• 66

• -66

The equation ​ ​ (a)   is correct.

• (-3)+5=2

• ​(-3)+5=-2

• ​-3+(-5)=-2

• ​3+(-5)=2

Mathematical Equivalence

ON

(-20) + 41 =

• 21

• -21

• 51

• -51

An integer problem is modeled on a number line.. Which equation best represents the model? ​ (a)  

• 7 + (-10)=-3

• 7 + (-3) =4

• -3 + 7=10

• 10 + (-3) = 7