Adding integers -same sign
4+4=
8
10+8=
18
9+(-3)=
6
-19+(20)=
1
-18+3=
-15
A positive plus a positive equals
positive
-13+(-10)=
-23
30+(-10)=
What is 20?
What is the rule of adding integers with different signs?
Subtract the numbers and take the sign of the bigger number.
What number can be added to -30 to have a sum of zero?
What is 30?
15+7=
22
What does sum mean? what does difference mean?
Addition/Subtraction
-9+(-10)=
-19
-76+(-3)=
What is -79?
-14+(4)=
-10
-340+(10)=
-330
7+(-4)=
What is 3?
A negative plus a negative equals?
Negative
-32+(-11)=
-43
-90+(-16)=
-106
18+(-10)=
8
-500+10=
-490
-15+(-3)=
-18
True or false? A negative plus a positive is always negative. Give an example to support your response.
False. Possible example: -6+15=9
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.
The absolute value of - 11
What is 11?
10+(-5)=
5
-343+13=
-330
-240+(-15)=
-255
What does it mean to find the absolute value?
The distance from a number to zero.