translating expressions

translating expressions

November 5th

Today's Learning Goal

I can read and write algebraic expressions

Today we going to learn to translate expressions from a verbal form to a written form

Before we begin, let's review our norms (our NORMAL standards for the way we interact with each other) for class.

Multiple Select

Pick ALL of the statements that describe the expectations for me while in the classroom:

• My camera is on. My face is showing. I answer questions when I am called on

• I have a pencil and paper with me when I log into class

• At the end of class, I can leave whenever I want

• It is okay for me use the chat box for a math question or to give information to Mrs. Waller and I SHOULD NOT use it to talk to friends

• I should be respectful to my classmates and my teacher. I should expect others to be respectful to me.

Multiple Choice

How many coefficients are in this expression?

• 1

• 2

• 3

• 4

Multiple Choice

What is 8 in the following expression?

72b - 8 + 9h + 2

• constant

• variable

• expression

• coefficient

Multiple Choice

Identify the coefficient in the expression
4m + n + 2

• 2
• 4
• m
• n

Multiple Choice

How many terms are in the expression
3x + 2y + z

• 5
• 2
• 4
• 3

Multiple Select

Select all that apply. An expression can contain ...

• coefficients

• variables

• an equal sign

• constants

Translating expression

This is just what it sounds like.

In a verbal expression, we use words. This is an example of a verbal expression:

The sum of three and four

To translate it, we need to look for a word that

signals us what operation to use. The numbers are rewirtten

Here are some examples

Three minus eight r is written 3 - 8 r

Eighteen w plus 2 t minus 4 is written 18w + 2t -4

Notice that the coefficient and the variable are written next to each other with no operation sign between them. When you see this it is understood that the operation is multiplication.

Use key words

Use the key words you were taught in earlier years in school to help you decide how to write the expression.

For example, if you see "the product of eight and 2" you know you are supposed to use which operation?

the word "than"

when you see the word than AFTER the number, you will be subtracting that number FROM the number following the word than. For example, SIX LESS THAN C means you will be subtracting 6 FROM c

Multiple Choice

Which operation do you use when writing an expression to describe this scenario? Joe collected $5 from his grandmother and $12 from his Aunt. How much did he receive in total?

• addition

• subtraction

• multiplication

• division

Multiple Choice

the product of x and sixteen

• x + 16
• x - 16
• 16x
• x/16

Multiple Choice

the difference between forty-six and a number

• 46 x n
• 46/n
• n-46
• 46 − n

Multiple Choice

46 less than a number

• 46 - n
• n - 46
• 46 + n
• n + 46

Multiple Choice

Translate this phrase into an algebraic expression.
8 less than the product of 4 and a number
Use the variable m to represent the unknown number.

• 8 - 4m
• 8m - 4
• 8m + 4
• 4m - 8

Multiple Choice

a number more than 12

• n + 12
• 12n 
• 12 + n 
• 12 - n