Adding Integers (10/9)

​Create this number line on the back of your multiplication chart

​Lesson Objective

• Model the addition of integers on a number line.
• Develop a rule for adding integers

Multiple Choice

Use the number line to write and complete the equation

1. The elevator starts at street level, goes up 7 floors, and

then goes down 3 floors.

• 0+7+(−3)=4

• 0+7+3=10

• 0+(−7)+(−3)=−10

• 0+(−7)+3=−4

Multiple Choice

The elevator starts at street level, goes up 10 floors, and then goes down 12 floors. Where does the elevator end up?

• 0+10+(−12)=−2

• 0+10+12=22

• 0+(−10)+(−12)=−22

• 0+(−12)+10=−2

Multiple Choice

The elevator starts at street level, goes down 4 floors, and then goes up 11 floors. Where does the elevator end up?

• 0+(−4)+11=7

• 0+4+11=15

• 0+(−4)+(−11)=−15

• 0+(−11)+4=−7

Multiple Choice

The elevator starts at street level, goes down 2 floors, goes up 5 floors, and finally goes down 3 floors. Where does the elevator end up?

• 0+(−2)+5+(−3)=0

• 0+(−2)+5+3=6

• 0+(−2)+(−5)+(−3)=−10

• 0+2+5+(−3)=4

NOTE:
Positive Numbers which way does the arrow go (left or right)
Negative Number which way does the arrow go (left or right)

Draw

Use the number line and draw the arrows based on the expression

There should be two arrows

1 + 3

Draw

Use the number line and draw the arrows based on the expression

There should be two arrows

0 + (-4)

Draw

Use the number line and draw the arrows based on the expression

There should be two arrows

-3 + 5

Draw

Use the number line and draw the arrows based on the expression

There should be two arrows

-1 + ( -4)

RULES ON ADDING WRITE THIS DOWN

SAME SIGNS ADD (KEEP your SIGN)
EX: 1 + 1 = 2 and -1 + (-1) = -2

Different Signs SUBTRACT (Keep the sign of the larger ABSOLUTE VALUE)
Ex: -10 + 1.
Subtract 10-1 which is 9
Absolute Values are 10 and 1 (10 is the bigger number and its sign is Negative so you keep the negative) ANSWER IS -9

Dropdown

Rule 1 Same Signs Add. Keep Your Sign

-3 + (-7) = ​

Select answer

3 + 7 = ​

Select answer

-8 + (-2) =​

Select answer

-4 + (-11) = ​

Select answer

9 + 5 =​

Select answer

Drag and Drop

Rule 2. Different Signs Subtract. Keep sign of larger absolute Value



-3 + 7 = ​

Placeholder

-9 + 5 = ​

Placeholder

3 + (-7) = ​

Placeholder

8 + (-2) = ​

Placeholder

4 + (-11) = ​

Placeholder

Drag these tiles and drop them in the correct blank above

4

-4

6

-7

7

-10

12

-5

FINISH ADDING IXL LESSONS