# Lesson: Add Integers Using Number Line

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### Lesson Plan

Standard

6NSO.N3  Know that numbers and their opposites add to 0 and are on opposite sides at equal distance from 0 on a number line; know that 0 is an integer that is neither negative nor positive

6NSO.C9 Know integer subtraction is the inverse of integer addition; use the number line to model addition and subtraction of integers and add and subtract integers

Aim/Objective:

Key Points

SWBAT add integers using a number line

SWBAT model addition of integers on a number line

·         When adding integers on a number line:

o    Start at the first addend by moving from zero to that number

o    If adding a positive number move RIGHT that many spaces

o    If moving a negative number move LEFT that many spaces

Assessment:

Exit Ticket:

1.      Corazon used the number line model shown below to help her write a true number sentence.

Which of the following could be Corazon’s number sentence?

 A. -4 + 2 = 6 B. -4 + 6 = 2 C. 2 + 6 = -4 D. 2 + -4 = 6

Use the number line below for questions 2 and 3.

2.      -6 + 10

3.      5 + (-9)

Lesson

Do Now:

Compare

-28               -5

Compare

38               56

Order from least to greatest

-4, 8, -10, 5, 2

Intro/Direct Instruction:

Teaching Points:  / Students take notes

·         We can use a number line to add integers

·         Always start at zero.  Then move to first addend

·         If the second addend is positive move RIGHT that many spaces

·         If the second addend is negative move LEFT that many spaces

·         The space you land on is your sum

·         Demonstrate with – 5 +  8

·         Model how to draw this on a number line.  (start end of arrow at zero, move to negative 5 with arrow. Draw new arrow on top of negative 5 and move 8 spaces to the right)

·         Model: -2 + 5; -9 + -3; 5 + -7

Guided Practice

o   Give students number lines and a hershey kiss.  Have them demonstarte the following problems (-5 + 5; -8 +2;  4 + -8 )
Students try and draw on number line models for (-4 + 4)  (-8 + -2)   (1 + -8)

Independent Practice:

Closing

·         Review how to model addition on the number line

·         Adding a positive means moving (RIGHT) on the number line

·         Adding a negative means moving (LEFT) on the number line

·         Exit Ticket

### Lesson Resources

 Notes Add Integers on Numberline   Notes 7,363 Notes 3 Number Line Add Integers 3,061 Notes 3 Number Line Add Integers 1,866 Exit Ticket Add Integers Number Line 3,584 CW Add Integers NumberLines 4,034