Algebra Word Expressions:

Practice series: Numeric Expression

1. Five increased by two            

2. The quotient of sixteen and four

3. four less than the sum of two and nine

4. negative twelve times three fewer than fifteen

5. The difference between the total of one and seven and the product of six and three

Answer Key: Numeric Expression:

1. 5 + 2
2. 16 / 4
3. 4- (2 + 9)
4. -12(15 -3)
5. (1 + 7) – 6(3)

Writing Phrases as Algebraic Expression:

The variable x is usually used to represent “a number” in these expressions.

            Just as a phrase ten more than five is written as 10 + 5

                                                Or

            The phrase ten more than a number is written as 10 + x

Unknown Variables:

We usually use x to represent the first number and y to represent the second number. Twice a number plus four times and other number would be written as 2x + 4y

1. Negative nine times a number

2. A number combined with six

3. Eight take away a number

4. A number shared by ten
5. Two plus one-half of a number (or a number divided by 2)

Answer Key: Unkown Variables

1.  x + -1y  simplifies to x-y
2. 7/x-y
3. xy - 18
4. x² -10y
5. 6(x) + (y-9)