Adding and Subtracting Integers
12 + -18
-6
6 (-8)
-48
–2.5 + 6.5
4
1/10 + -3/10
-2/10
Two numbers with the same absolute value but with different signs.
Opposites (bonus points for additive inverses)
-6 - 4
-10
7 (7)
49
7.3 + 9.3
16.6
5/8 + -3/8
2/8 or 1/4
The set of positive and negative whole numbers
Integers
-9 + -21
-30
-5 (-10)
50
3.9 − 8.7
-4.8
1/5
The distance that a number is away from zero
Absolute value
23 - (-17)
40
14 (-3)
-42
99.2 + –37.4
61.8
-2/5+ -1/2
-9/10
Numbers that can be written as a fraction in the form a/b, where a and b are integers and b does not equal 0.
Rational Numbers
-14 - (-22)
8
-15 (15)
-225
–13.9 − –33.9
20
-3/5 - (-3/4)
3/20
A fraction that switches the position of the numerator and the denominator
Reciprocal