Mathletes Fab Five 1) -12 + (-66) + (-48) 2) A football team receives a 5- yard penalty on one play and a 10-yard penalty on the next. Write a sum.

Mathletes Fab Five1)-12 + (-66) + (-48) 2)A football team receives a

5-yard penalty on one play and a 10-yard penalty on the next. Write a sum of negative integer to represent this situation.

3)Eli had mini-golf scores of -3, -4, and -3. What was his total score for the three rounds?

1)-126

2)-5+ (-10)

3)-10

Adding Integers with Different

Signs

Lesson 1.2

• Start from 0• Positive go right• Negative go left• Answer is at

your final destination

Modeling on the Number Line

Examples:1.) 4 + (-3)

2.) -6 + 4

0 41

0-6 -2

= 1

= -2

Zero Pair: When you add a

positive integer and a negative integer the result is zero

1+( -1) =0

Example:

Vocabulary Word

One positiveOne negative

Cancels each other

• Group together your Zero Pairs• What is left over

is your answer

Modeling Using Red/Yellow Tiles

Examples:1.) 3 + (-2)

2.) -6 + 3

= 1

= -3

How do you add integers with different signs?

1. Find the absolute values2. Subtract the smaller absolute value

from the larger.3. Use the sign of the integer with the

greater absolute value.

Essential Question

Remember:

Different sign subtract

Keep the sign of the larger number

Examples:

1.) -51 + 20

2.) 13 + (-13)

3.) 10 + (-18)

4.) 25 + (-26)

Add the integers.

-31

-0

-8

-1

Homework

•Workbook Page 16-17• (#1-25 ALL)