Adding Integers

Adding Integers

Rules for Additive Inverses (Opposites)

• Additive Inverses (Opposites) will always equal 0

• 2 + (-2) = 0

• -3 + 3 = 0

Rules for Integers with the Same Signs

• Add the integers

• Keep the sign of the integers

• Positive + positive = positive

• Negative + negative = negative

Multiple Choice

5 + 8 =

• 13

• -13

Multiple Choice

-4 + (-15)

• 19

• -19

Multiple Choice

If the greater absolute value is a negative integer, the sum will be

• Positive

• Negative

Multiple Choice

If the greater absolute value is a positive integer, the sum will be

• Positive

• Negative

Multiple Choice

3 + (-5)

• 2

• -2

Multiple Choice

-10 + 14

• 4

• -4

Multiple Choice

5 + (-8)

• 3

• -3

Multiple Choice

-20 + 13

• 7

• -7

Word Problems

• Read it 3 times

• #1 - What is the situation about?

• #2 - What are the important quantities?

• #3 - What is the question(s)?

Multiple Choice

A football team gained 9 yards on one play and then lost 22 yards on the next. Write and solve an expression to represent their overall change in yards.

• 9 + (-22) = 13

• 9 + (-22) = -13

Multiple Choice

Bob lost 5 points on page one of his math test and he lost 9 points on page two of his math test. Which equation best describes Bob progress on his math test?

• 5 + 9 = 14

• -5 + -9 = -4

• -5 + -9 = -14

• 5 + -9 = -4