Math Expressions

Math Expressions

Turning Words into Numbers

Words that mean add

• Sum

• Total

• Altogether

• Increase

• All (in all)

• More than

Example

The total of a number and 23

n + 23

Words that mean subtract

• Minus

• Greater than

• Take way

• Fewer than

• Less than

• Decrease by

Example

The difference of a number and 5

n - 5

Words that mean multiply

• Product

• Times

• Twice

• 
  

  *Remember - anytime we glue a variable (letter) to a number without a space we are saying the two need to be multiplied.

Example

The product of 12 and a number

12n

Words that mean divide

• Quotient

• Dividend

• Each

• Per

• Average

• Split equally

• *Remember that a fraction is a division problem (Top divided by bottom)

Example

Multiple Choice

Sum means to

• Add

• Subtract

• Multiply

• Divide

Multiple Choice

A quotient is the answer to a(n)

• addition problem

• subtraction problem

• multiplication problem

• division problem

Multiple Choice

Difference is the answer to a(n)

• addition problem

• subtraction problem

• multiplication problem

• division problem

Multiple Choice

To find the product means to

• add

• subtract

• multiply

• divide

Writing an expression

When asked to write an expression you will need to take the number given, apply the correct word for the operation of the problem, and substitute a letter for the words "a number"

Example

Example

Write the word phrase for this expression:

4d

The product of 4 and a number

Multiple Choice

Which is the correct expression for the phrase:

6x

• The quotient of a number and 6

• The product of 6 and a number

• The difference between 6 and a number

• The sum of a number and 6

Multiple Choice

Which is the correct phrase for this expression.

n-13

• The product of a number and 13

• The product of 13 and a number

• The difference of a number and 13

• The difference of 13 and a number

Multiple Choice

Which is the correct expression for this phrase:

 $\frac{p}{25}$  

• The quotient of a number and 25

• The quotient of 25 and a number

• The product of a number and 7

• The product of 7 and a number

The quotient of a number and p

In subtraction and division problems, order matters.

For subtraction the the second value is being taken away from the first.

For division the first value is being divided by the second.

Example

Example

The difference of a 7 and a number = 7-n

The difference of a number and 7 = n-7

Multiple Choice

Which of the expressions is written correctly for the following phrase?

The sum of a number and 2

• 2 - n

• 2n

• n + 2

Multiple Choice

Which of the expressions is written correctly for the following phrase?

5 divided by a number

• 
  

  $\frac{n}{5}$

• 5n

• $\frac{5}{n}$

Multiple Choice

Which of the expressions is written correctly for the following phrase?

The difference of 6 and a number.

• 6n

• n-6

• 6-n

Multiple Choice

Which of the expressions is written correctly for the following phrase?

5 less than a number

• 5 - n

• n - 5

Multiple Choice

6 more than a number

• 6 + n

• 6-n

• n - 6

Multiple Choice

Which of the expressions is written correctly for the following phrase?

The produce of twice a number

• n + 2

• 2n

• 3n

• n + 4

Multiple Choice

Which of the expressions is written correctly for the following phrase?

5 divided by a number

• 
  

  $\frac{n}{5}$

• 5n

• $\frac{5}{n}$