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### Course: 4th grade>Unit 14

Lesson 9: Money word problems

# Currency conversion word problem

Sal converts between American dollars and Chinese yuan. Created by Sal Khan.

## Want to join the conversation?

• I don't understand this. I have problems with this kind of math. Anyone that can help me please. Addison :)
(10 votes)
• It says that Dennis likes a sweater that costs 197 Chinese yuan. He wants to spend \$30.
Now,
\$1 = 6 Chinese yuan
so, \$30 = ( 6 x 30 ) = 180 Chinese yuan

Now the question is whether he has enough money to buy the sweater that he likes, which costs 197 Chinese yuan.
197 is more than 180 Chinese yuan, so therefore we can conclude that he does not have enough money to buy the sweater.

I hope this helps :))
(6 votes)
• I don’t understand this lesson I need help
(4 votes)
• im from china and david said yuan wrong
(2 votes)
• If Rs 109 = \$1, £9.4 = \$10, how many pounds can be exchanged with Rs 2040 after devaluation in Rs by 10%?
(2 votes)
• I understand that conversion between metric and imperial is important but I dont feel this should even be a lesson. Like when am I going to use Yuan? On the other hand Japan has a 7.7% travel rate among the population. Why bother teaching this now at 4th grade?
(2 votes)
• This makes so much sense
(1 vote)
• Im at home and I am bored any tips
(1 vote)
• How many cents are in 100 dollars?
(1 vote)
• 100 cents = 1 dollar
100 cents * 100 dollars = 10,000 cents
(the"*"symbol is for times in C++ code. I used it since I couldn't find the normal times symbol.)
(1 vote)
• 1 peso equals \$.075, how many peso equal \$100
(0 votes)
• 1/0.75 = 1 1/3 pesos/\$
therefore 100\$ * 1 1/3 pesos/\$ = 133 1/3 pesos (\$ cancels out)
(0 votes)

## Video transcript

Dennis is vacationing in China and wants to spend \$30 on a new sweater. The sweater he likes costs 197 Chinese yuan . One US dollar can be converted into 6 Chinese yuan. Dennis will have blank Chinese yuan if he converts his \$30. Well, let's think about this. He's going to take \$30, and the conversion rate is 6 yuan per dollar. So he's going to have \$30 times 6 yuan per dollar. So he's going to have 30 times 6 yuan. And 30 times 6, well, that's the same thing as 3 times 6 times 10, or 180. So he's going to have a 180 Chinese yuan. Now does he have enough money to buy the sweater? Well, the sweater cost 197 yuan. So no, he does not have enough money to buy the sweater.