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