Writing Algebraic Expressions

What is a variable?

• A letter that represents an unknown number.

• A number that represents a letter.

• A number that is used in algebra.

• It is a letter that represents nothing.

Write an expression for:

The sum of y and 10.

• y - 10

• y + 10

• 10y

• 10/y

Write an expression for:

Add 9 to x.

• 9 + 9

• x - 9

• x + x

• x + 9

Write an expression for:

Subtract 18 from p.

• p - 18

• 18 - p

• p + 18

• 18 + p

Write an expression for:

w less than 10.

• 10/w

• 10 + w

• 10 -w

• 10w

Write an expression for:

5 groups of f.

• 5/f

• 5 - f

• 5f

• 5 + f

Write an expression for:

The product of 15 and k.

• 15 - k

• 15 + k

• 15k

• 15/k

Write an expression for:

Divide n by 14

• 14 + n

• 14/n

• 14n

• n/14

Write an expression for:

The sum of 4 and p divided by 2.

• 4 - p / 2

• 4 + p / 2

• 4p / 2

• 4 + p (2)

Write an expression for:

Divide the product of 5 and f by 3.

• 5 - f / 3

• 5 + f / 3

• 5f / 3

• 5 / 3