Adding Same Signs
Show your work using chips.
-2+(-1)=
-3
-5+2=
If a = 1 and b = 3 what is: a + b
4
Inverse
Opposite
1 and -1 are what?
Opposites, or Inverses!
-5+(-2)=
-7
-10+3=
-7
If a = 5 and b = 8, what is -a + (-b)?
-13
Absolute Value
How far a number is from zero
Negative numbers are to the ___________ of zero.
Left
7+10
17
12+(-2)
10
I a = 7 and b = 7, what is a + (-b)?
0
What is an integer?
A POSITIVE or NEGATIVE WHOLE NUMBER including 0
If you are adding two numbers with different signs what do you do?
You subtract and KEEP the sign of the bigger number (the bigger absolute value)
20+15 + 12
47
-11+7 + 4
0
If a = 9, b = 3 and c = 6, what is -a + (-b) + (-c)?
-18
What can't an integer be?
It cannot be a fraction or a decimal
What do you do if you add numbers with the same signs?
KEEP the sign and ADD the two numbers together
17+(-16) + (-10)
-9
-6+(-12) + 8
-10
If a = 10 and b = 12, what is a + b + (-10)
12
These signs are <, >, =
Must be in correct order
less than, greater than, and equal to
Can absolute value be negative? Why or why not?
No because it's the number's distance from zero on a number line and distance can't have a negative value.