Vocab
Zero Pair
A number paired with its opposite number which equals 0.
(+3) + (-3) = 0
(-5) + (+9) =
4
(-4) - (+6) =
-10
(-2) - (+3) =
-5
Integer
A positive or negative number on the number line.
(-12) + (+5) =
-7
(+4) - (+11) =
-7
(-10) + (+30) =
20
Opposite Integer
An integer that is the same distance from zero as the original number just on the other side.
The opposite of (+3) is (-3).
(-16) + (-17)
-33
(+15) - (-7) =
22
(+21) - (+5) =
16
Sum
The answer when you add two numbers.
The sum of 3 and 5 is 8.
How do you find the sum of numbers with different signs?
Describe a strategy
(-27) - (-3) =
-24
Subtracting a negative is the same thing as...
Adding a positive
Difference
The answer when you subtract two numbers.
The difference of 8 and 2 is 6.
(-16) + (+18)+ (-17) =
-15
(-10) - (+11) - (-3) =
-18
(-10) + (-2) - (+5) =
-17