Understanding Parts of an Expression

What is an expression?

• A mathematical phrase with an equal sign

• A mathematical phrase without an equal sign

• A number multiplied by a variable

• A letter that represents an unknown.

Identify the coefficient in the expression 8n - 3.

• 8

• n

• 3

• -3

Fill in the blank: A variable is a letter that represents an ______.

• A) known

• B) unknown

• C) number

• D) constant

How many terms does the expression 7g - 5 + 3h have?

• 1

• 2

• 3

• 4

What is the constant term in the expression -2.5r + 7.2s + 0.8?

• -2.5

• 7.2

• 0.8

• 0

Fill in the blank: In the expression 2/3 - 1/4j + 1/2k^2, the variables are ______ and ______.

• A) j and k

• B) 2 and 3

• C) 1 and 4

• D) k and 2

What is the coefficient of the second term in the expression -7a - 5b + 8?

• -7

• -5

• 8

• 5

Write an expression with two terms. The second term should be a constant.

• A) x + 5

• B) 3y - 2

• C) 4z

• D) 7

Fill in the blank: An expression with three terms where the first term has a negative coefficient and the second term has n as a variable and a coefficient of 8 is ______.

• -3x + 8n + 5

• 8n - 3x + 5

• -3x + 5 + 8n

• 5 + 8n - 3x

What is the coefficient of the last term in the expression 2/3 - 1/4j + 1/2k^2?

• 2/3

• 1/4

• 1/2

• 2