1. Number Lines

2. Rules for Multiplication and Division
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Addition
Subtraction
Positive + Negative
Left
Positive - Negative
Right
Negative + Negative
Negative - Negative
Negative + Positive
Negative - Positive
Positive + Positive
Positive - Positive
Rules for Multiplication and Division
Positive x Positive
Positive
Positive x Negative
Negative
Negative x Positive
Negative x Negative