Write Algebraic Expressions

Writing Algebraic Expressions

I will be able to write algebraic expressions from word form.

​Do you speak or read another language?

​Algebra and algebraic expressions are similar to translating words into another language!

​In English we say the adjective or describing word BEFORE the subject.

​In Spanish we say the adjective or describing word AFTER the subject.

​"The lady is pretty"

​"La dama es bonita"

Multiple Select

Which ones are expressions?

• 6x + 9 = 15

• 5 - 2x

• 8y (2y)

• 4m + 14

Multiple Select

Which ones are equations?

• 6x + 9 = 15

• 5 - 2x

• 8y (2y)

• 4m + 14 = 26

​Here are some key words that will translate to operations when you write an algebraic expression.

​How do switch words work?

​seven less than a number

​n - 7

​

​12 from a number

​n - 12

​

​3.5 less than a number

​n - 3.5

​

​4 from a number

​n - 4

​when you see "less than" or "from" you will switch the order that they are written and use subtraction.

Eight more than n

• Step 1: Identify key words (more than)

• Step 2: Translate the key words into operations (add)

• Step 3: Write the expression in the correct order

Fill in the Blanks

Write the phrase as an algebraic expression:

eight more than n

the difference of q and five

• Step 1: Identify key words (difference)

• Step 2: Translate the key words into operations (subt.)

• Step 3: Write the expression in the correct order

Fill in the Blanks

Write the phrase as an algebraic expression:

the difference of q and five

nineteen added to j

• Step 1: Identify key words (added)

• Step 2: Translate the key words into operations (add)

• Step 3: Write the expression in the correct order

Fill in the Blanks

Write the phrase as an algebraic expression:

nineteen added to j

fourteen increased by b

• Step 1: Identify key words (increased)

• Step 2: Translate the key words into operations (add)

• Step 3: Write the expression in the correct order

Fill in the Blanks

Write the phrase as an algebraic expression:

fourteen increased by b

twelve less than p

• Step 1: Identify key words (less than)

• Step 2: Translate the key words into operations (subt.)

• Step 3: Write the expression in the correct order

Fill in the Blanks

Write the phrase as an algebraic expression:

twelve less than p

k less seven

• Step 1: Identify key words (less)

• Step 2: Translate the key words into operations (subt.)

• Step 3: Write the expression in the correct order

Fill in the Blanks

Write the phrase as an algebraic expression:

k less seven