Adding Integers

Adding integers -same sign

100

4+4= 

8 

200

-13+(-10)= 

 -23 

300

-9+(-10)= 

-19 

400

-32+(-11)= 

-43 

500

True or false? -22+23 a zero pair? Explain.

False. A zero pair would be -22+22 or -23+23. to create a zero pair you must add a number and its opposite. 

Adding integers -same sign

100

10+8= 

18

200

30+(-10)= 

What is 20? 

300

-76+(-3)= 

What is -79? 

400

-90+(-16)= 

-106

500

The absolute value of - 11

What is 11?

Adding integers -different sign

100

9+(-3)= 

6

200

What is the rule of adding integers with different signs?

Subtract the numbers and take the sign of the bigger number.

300

-14+(4)=

-10

400

18+(-10)= 

8

500

10+(-5)= 

5 

Adding integers -different sign

100

-19+(20)=

1

200

What number can be added to -30 to have a sum of zero?

What is 30?

300

-340+(10)= 

-330

400

-500+10= 

-490

500

-343+13=

-330

Mixed practice

100

-18+3= 

-15

200

15+7=

22

300

7+(-4)=

What is 3?

400

-15+(-3)=

-18

500

-240+(-15)= 

-255

Random

100

A positive plus a positive equals

positive

200

What does sum mean? what does difference mean?

Addition/Subtraction

300

A negative plus a negative equals?

Negative

400

True or false? A negative plus a positive is always negative. Give an example to support your response. 

False. Possible example: -6+15=9

500

What does it mean to find the absolute value?

The distance from a number to zero.