How does 1/3 x 36 = 12?

1 * 36 = 36 3 * 1 = 3 Since 36 = 36/1, 1*36 / 3*1 is the same thing as saying 36/3, or 12. Or, think of it this way: 1/3 * 36 is the same as 36 / 3, which is also 12.

WHAT IS 6^2 + x - x^26 2 +x−x 2 6, squared, plus, x, minus, x, squared for x=3x=3x, equals, 3.

It appears you tried to copy and paste a question, but the syntax is so confusing, it is difficult to tell what you are really asking.

At the second question with thirds how do you do like thirds,half's and quarters. Do you divide your number by like thirds if it was thirds? For example 1/2 5 do you divide by half’s? I don’t think sal said anything about that.

no you divide by 2 when you multiply by 1/2

so how do u find out what x is if the problem didnt say the answer

You cannot evaluate an expression unless they give you value(s) to put in. without the value(s), it just remains an expression.

So every time you see an x that’s immediately three? This is so confusing!

No, the question will say what x equals. Ex. 5x when x=4, you will change x into 4 and get the question 5x4=20

Main content

6th grade

Course: 6th grade > Unit 6

Lesson 4: Substitution & evaluating expressions

Evaluating expressions like 5x² & ⅓(6)ˣ

Name: Evaluating expressions like 5x² & ⅓(6)ˣ
Uploaded: 2022-01-18T21:00:10.077579154Z
Description: We work through a few examples showing how to evaluate some common expressions we see involving variables, exponents, and fractions.

CCSS.Math:

6.EE.A.2

6.EE.A.2c

Google Classroom

We work through a few examples showing how to evaluate some common expressions we see involving variables, exponents, and fractions. Created by Sal Khan.

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Jose Morales
Posted 8 months ago. Direct link to Jose Morales's post “How does 1/3 x 36 = 12?”
How does 1/3 x 36 = 12?
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(5 votes)
Answer
- SP
  Posted 8 months ago. Direct link to SP's post “1 * 36 = 36 3 * 1 = 3 Sin...”
  1 * 36 = 36
  3 * 1 = 3
  Since 36 = 36/1, 1*36 / 3*1 is the same thing as saying 36/3, or 12.
  
  Or, think of it this way: 1/3 * 36 is the same as 36 / 3, which is also 12.
  Button navigates to signup page
  (6 votes)
rilgoe217
Posted 7 months ago. Direct link to rilgoe217's post “WHAT IS 6^2 + x - x^26 ...”
WHAT IS 6^2 + x - x^26
2
+x−x
2
6, squared, plus, x, minus, x, squared for x=3x=3x, equals, 3.
Button navigates to signup pageButton navigates to signup page
(3 votes)
Answer
- David Severin
  Posted 7 months ago. Direct link to David Severin's post “It appears you tried to c...”
  It appears you tried to copy and paste a question, but the syntax is so confusing, it is difficult to tell what you are really asking.
  Button navigates to signup page
  (4 votes)
Madisyn Gonzales
Posted 4 months ago. Direct link to Madisyn Gonzales's post “How it equals 12 is becau...”
How it equals 12 is because they did 36 divided by 3 = 12
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(3 votes)
Answer
- Jove
  Posted a month ago. Direct link to Jove's post “36/3 = 12 can be simplifi...”
  36/3 = 12 can be simplified to (30/3 + 6/3)
  which gives you 10 + 2, which is equal to 12.
  Button navigates to signup page
  (1 vote)
Sayla Fret
Posted 9 months ago. Direct link to Sayla Fret's post “So every time you see an ...”
So every time you see an x that’s immediately three? This is so confusing!
Button navigates to signup pageComment on Sayla Fret's post “So every time you see an ...”
(0 votes)
Answer
- Mr. detective
  Posted 8 months ago. Direct link to Mr. detective's post “No, the question will say...”
  No, the question will say what x equals.
  Ex. 5x when x=4, you will change x into 4 and get the question 5x4=20
  Comment on Mr. detective's post “No, the question will say...”
  (7 votes)
Areana Swan 🦢
Posted 7 months ago. Direct link to Areana Swan 🦢's post “I need help I am confused...”
I need help I am confused with fractions and exponents.
What do with other fractions.
Button navigates to signup pageComment on Areana Swan 🦢's post “I need help I am confused...”
(3 votes)
Answer
hg5fnhxj67
Posted 9 months ago. Direct link to hg5fnhxj67's post “At the second question wi...”
At the second question with thirds how do you do like thirds,half's and quarters. Do you divide your number by like thirds if it was thirds? For example 1/2 5 do you divide by half’s? I don’t think sal said anything about that.
Button navigates to signup pageButton navigates to signup page
(2 votes)
Answer
- timothy.ogle0
  Posted 7 months ago. Direct link to timothy.ogle0's post “no you divide by 2 when y...”
  no you divide by 2 when you multiply by 1/2
  Button navigates to signup page
  (3 votes)
austina
Posted 6 months ago. Direct link to austina's post “can you help me”
can you help me
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(2 votes)
Answer
- kamryn
  Posted 6 months ago. Direct link to kamryn's post “you have to to equal 3”
  you have to to equal 3
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  (2 votes)
kamryn
Posted 6 months ago. Direct link to kamryn's post “ok this is good”
ok this is good
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(2 votes)
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- Jack_o_James
  Posted 2 months ago. Direct link to Jack_o_James's post “Or Is It?”
  Or Is It?
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  (2 votes)
thomasenfield
Posted a month ago. Direct link to thomasenfield's post “goodjob”
goodjob
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(2 votes)
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RIAH
Posted 4 months ago. Direct link to RIAH's post “so how do u find out what...”
so how do u find out what x is if the problem didnt say the answer
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(1 vote)
Answer
- David Severin
  Posted 4 months ago. Direct link to David Severin's post “You cannot evaluate an ex...”
  You cannot evaluate an expression unless they give you value(s) to put in. without the value(s), it just remains an expression.
  Button navigates to signup page
  (2 votes)

Video transcript

- [Instructor] What I want you to do is evaluate the expression 5x squared when x is equal to three. Pause this video and have a go at that. All right, well, we just have to think about every place we see an x, we'll now replace it with a three. So this is going to be equivalent to five times, instead of x squared, it's going to be five times three squared. And we know from order of operations, we do the exponents first. That's why I actually put a parentheses around the three squared to just make that clear. And three squared is, of course, equal to nine and five times nine is equal to 45. Let's do another example that's a little bit different. Let's say I have the expression 1/3 times six to the x power, and I want to evaluate it when x is equal to two. Pause the video again and see if you can work that out. Well, once again, everywhere where we see an x, we'll replace that with a two. So this is going to be the same thing as 1/3 times six squared. Where we saw the x, we now replace that with a two. And so this is going to be equal to, we do the exponent first, order of operations, so it's going to be 1/3 times six squared is 36, and 1/3 of 36 is equal to 12. And we're done!