Why would adding and multiplying variables be helpful in every day life

If you're short on money, walking around a grocery store, you sometimes have to add the food items together and multiplying the sum with the sales tax to see if you can afford them all.

How do you know what part to put first or last? It isn't specified.

You may put it in any order, but I would recommend that you write the expression with whatever comes first. What I mean by that is this: Suppose you have to write an expression from this description: _six added to the product of 4 and y_ You can write it like this: 4y + 6 Or like this: 6 + 4y Unless it is subtraction, you can write it in any order you choose. I like how the first answer sounds, but I would prefer the second answer because it is in the order that the question is written in, to double-check my work. But yes, you can do it any way you wish.

What if you get confused in the negative sign and the subtraction sign?

If you regularly get confused, consider using brackets or parentheses to separate them.

what does it mean by eight less?

Eight less than a number means 8 subtracted from the number. So 8 less than x means x-8 (but not 8-x).

How do you do it it’s very hard😩

what are you confused on? What part of the math?

Main content

6th grade

Course: 6th grade > Unit 6

Lesson 8: Writing algebraic expressions introduction

Writing expressions with variables

Google Classroom

Learn to write expressions for more challenging phrases like "8 less than the product of 7 and x."

Khan Academy video wrapper

Writing expressions with variablesSee video transcript

Now, let's practice!

Question 1

Write an expression that means "eight less than the product of seven and $x$ ‍".

Question 2

Write an expression that means "the sum of six and the product of three and $d$ ‍".

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jacob_tolle
Posted 8 years ago. Direct link to jacob_tolle's post “Why would adding and mult...”
Why would adding and multiplying variables be helpful in every day life
Button navigates to signup pageComment on jacob_tolle's post “Why would adding and mult...”
(46 votes)
Answer
- Ole Drews Jensen
  Posted 8 years ago. Direct link to Ole Drews Jensen's post “If you're short on money,...”
  If you're short on money, walking around a grocery store, you sometimes have to add the food items together and multiplying the sum with the sales tax to see if you can afford them all.
  Comment on Ole Drews Jensen's post “If you're short on money,...”
  (32 votes)
rhughes
Posted 7 years ago. Direct link to rhughes's post “How do you know what part...”
How do you know what part to put first or last? It isn't specified.
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(17 votes)
Answer
- Ellipsis
  Posted 7 years ago. Direct link to Ellipsis's post “You may put it in any ord...”
  You may put it in any order, but I would recommend that you write the expression with whatever comes first.
  What I mean by that is this:
  Suppose you have to write an expression from this description:
  six added to the product of 4 and y
  You can write it like this:
  4y + 6
  Or like this:
  6 + 4y
  Unless it is subtraction, you can write it in any order you choose. I like how the first answer sounds, but I would prefer the second answer because it is in the order that the question is written in, to double-check my work. But yes, you can do it any way you wish.
  Comment on Ellipsis's post “You may put it in any ord...”
  (12 votes)
Ahtziri198
Posted 4 years ago. Direct link to Ahtziri198's post “what does it mean by eigh...”
what does it mean by eight less?
Button navigates to signup pageComment on Ahtziri198's post “what does it mean by eigh...”
(8 votes)
Answer
- Ian Pulizzotto
  Posted 4 years ago. Direct link to Ian Pulizzotto's post “Eight less than a number ...”
  Eight less than a number means 8 subtracted from the number. So 8 less than x means x-8 (but not 8-x).
  Comment on Ian Pulizzotto's post “Eight less than a number ...”
  (9 votes)
singhsatish77
Posted 6 years ago. Direct link to singhsatish77's post “What if you get confused ...”
What if you get confused in the negative sign and the subtraction sign?
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(9 votes)
Answer
- Mwu32
  Posted 3 months ago. Direct link to Mwu32's post “If you regularly get conf...”
  If you regularly get confused, consider using brackets or parentheses to separate them.
  Button navigates to signup page
  (3 votes)
jagger.barton
Posted 10 months ago. Direct link to jagger.barton's post “is math boring if it is u...”
is math boring if it is up vote if it is not down vote
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(9 votes)
Answer
- l Joy l
  Posted 4 months ago. Direct link to l Joy l's post “tbh, i am like 100% not a...”
  tbh, i am like 100% not a math person, so, ya, its boring.
  Button navigates to signup page
  (1 vote)
neena gohil
Posted 7 years ago. Direct link to neena gohil's post “I also agree with him but...”
I also agree with him but we do have hints still if needed sometimes if we are stuck.
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(9 votes)
Answer
rm63994
Posted 4 years ago. Direct link to rm63994's post “How do you do it it’s ver...”
How do you do it it’s very hard😩
Button navigates to signup pageComment on rm63994's post “How do you do it it’s ver...”
(6 votes)
Answer
- Elaina163
  Posted 3 years ago. Direct link to Elaina163's post “what are you confused on?...”
  what are you confused on? What part of the math?
  Comment on Elaina163's post “what are you confused on?...”
  (4 votes)
Mr.Man
Posted 3 years ago. Direct link to Mr.Man's post “You would do if it says 8...”
You would do if it says 8 less than 10 then put it at the end like 10+8 or 6 more than 7 then 7+6
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(8 votes)
Answer
Mohammed Al-Abdali
Posted 6 years ago. Direct link to Mohammed Al-Abdali's post “Q1: Write an expression t...”
Q1: Write an expression that means "eight less than the product of seven and x".
can it not be written as 8-7x
?
Button navigates to signup pageComment on Mohammed Al-Abdali's post “Q1: Write an expression t...”
(2 votes)
Answer
- Xi Li
  Posted 4 years ago. Direct link to Xi Li's post “Well, If you want 8 less ...”
  Well, If you want 8 less than 7x, you take away 8 FROM 7x. The reason because if you want to take away 1 from 10, you would do 10-1 not 1-10.
  
  If you get what I mean.
  Button navigates to signup page
  (0 votes)
john
Posted 3 months ago. Direct link to john's post “i dont home school lol im...”
i dont home school lol im just saying dont take it personally
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(4 votes)
Answer