Negative Integer/Fraction Reference Sheet
9
1. Mixed Fractions ( 4 ½ )  Change to Improper ( )
2
2. Make sure they have a common denominator (bottom numbers are the
same)
 Yes, Common Denominator: Add/”Subtract” Across top
 Same Signs-Add (and keep the sign)
 Different Signs-Subtract (keep sign of the bigger
number)
 Double negatives “cancel” -10 - -1  -10 + 1
 No Common Denominator: Find one
 Method 1: Times denominators (bottom #) by each other
& times the numerator by the same number
−5
3
−5 × 4
3×6

− = 
−
=
6
4
6×4
4×6
 Method 2: Least common denominator
−3
1
−3 × 1
5×4
 Example: + =  :
+
=

−3
20
8
2
8×1
2×4
+ =
8
o 2, 4, 6, 8, 10, 12….
o 8, 16, 24, 32….
o Add/”Subtract” Across top
 Same Signs-Add (and keep the sign)
 Different Signs-Subtract (keep sign of the bigger
number)
 Double negatives “cancel” -10 - -1  -10 + 1
 SIMPLIFY
8