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### Course: Staging content lifeboat>Unit 14

Lesson 39: Fractions as division

# Mixed numbers on a number line

Sal locates 3/2 on a number line. Created by Sal Khan.

## Want to join the conversation?

• Why did Salman put 1/2 for each soap instead of 1/6?
• because he was seeing each bar of soap as an individual bar not one whole, if that makes sense.
• At how is 3/2 the exact same as 1 and 1/2. I think he should explain why he gets the answer more specifically, or its probably im not understanding because im still in 4th grade.
• 3/2 is 1 1/2 because 1 1/2 is basically 1+1/2. 1 is also 2/2, and 2/2+1/2=3/2.
Do you see what I mean? I hope I helped you!
• how do u multiply and divide mixed numbers and keep it in fraction form.
• first you divide the top number of your fraction by the bottom. EX. 44/2 44 divided by 2= 22(, which means 22/1 )then you multiply the two numbers together. lets say the other numbers 4/2. That =2/1 (which means 2) So 22/1 ><2/1 =44/1 which = 44
• do you have to put a number line
• No you don't need a numberline. all you have to do is, if the top is bigger than the bottom, you see how many times the bottom goes in to the top, and express as a mixed number
(1 vote)
• who is Sal's wife?
• Why r u asking? ;)
• What is 14 / (7/9)? is this another way of saying, "How many 7/9 groups can we find in 14?
• 14 / (7/9) is really (14/1) / (7/9), so you simply divide the fractions. [(14/1) / (7/9) really means (14/1) divided by (7/9).]

1.) When you divide fractions you multiply by the reciprocal. [the reciprocal of 1/2 is 2/1]
(14/1) / (7/9) = (14/1) * (9/7)

2.) Now you just multiply:
14/1 * 9/7 = (14 * 9) / (1 * 7) = (126) / (7)

So 14 / (7/9) = 126/7. You could then try to reduce or change to a mixed number.
• at how do num lines come to play