| A | B |
|---|
| whole numbers | the set {0,1,2,3,...} |
| positive numbers | numbers to the right of zero |
| negative numbers | numbers to the left of zero |
| origin | zero on the number line |
| opposites | a pair of numbers that are the same distance from zero |
| integers | whole numbers and their opposites |
| absolute value | the distance a number is from zero on the number line |
| inequality symbols | used to show the relationship between numbers |
| sum | the answer to addition |
| difference | the answer to subtraction |
| rule for subtracting | add the opposite |
| -(-5) | "the opposite of negative 5" |
| rule for adding same signs | add and keep the sign |
| rule for adding different signs | subtract and take the sign of the number with the greater absolute value |
| the sum of a pair of opposites | always equals zero |
| |x|= -1 | no solution |
