Accentuate the Negative 2.1 and 2.2 - Clarifying algorithms for subtraction and addition.

Algorithm for adding:

If addends have the same sign then COMBINE.

Example:

2 + 8 = 10
-2 + -8 = -10
8 +12 = 20
- 8+ -12 = -20

If addends have opposite signs CANCEL and the sum takes the sign of the addend with the larger absolute value (number further from zero).

Example:

2 + -8 = -6
-2 + 8 = 6
8 + -12 = -4
-8 + 12 = 4

Algorithm for subtracting:

Subtracting is the same as adding the opposite of the second number (subtrahend).

Example:

-4 - 3 = -7
-4 + - 3 = -7

8 - 3 = 5
8 + -3 = 5

6 - -7 = 13
6 + 7 = 13