| Term | Definition |
| variable | A letter that stands for a number. 1-1 |
| algebraic expression | An expression that contains at least one variable. 1-1 |
| substituting | The act of replacing a variable with another number. 1-1 |
| evaluate | To substititute numbers for all variables, and then to calculate. 1-1 |
| natural numbers | Counting numbers; 1, 2, 3... 1-1 |
| whole numbers | Natural numbers ( counting numbers) and zero; 0, 1, 2, 3... 1-1 |
| rational numbers | Natural numbers, whole numbers, negative numbers, and fractions are included in this tpye of number 1-1 |
| grouping symbols | Paranathesis group numbers, which means they would be called this. 1-1 |
| 13 | EVALUATE 1-1: x+6 for x=7. |
| 10 | EVALUATE 1-1: 1+y for y=9 |
| 10 | EVALUATE 1-1: m-2 for m=12 |
| 48 | EVALUATE 1-1: 4h for h=12 |
| 6 | EVALUATE 1-1: p/5 for p=30 |
| -30 | EVALUATE 1-1: 5g for g= -6 |
| 1/6 | EVALUATE 1-1: y/12 for y=2 |
| -15 | EVALUATE 1-1: y-10 for y = -5 |
| 3 | EVALUATE 1-1: 10x+2 for x =1/10 |
| 1 | EVALUATE 1-1: 12/x for x=12 |