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### Course: Arithmetic>Unit 4

Lesson 3: Fractions on the number line

# Finding 1 on the number line

Sal locates 1 on a number line labeled with 0 and a unit fraction.

## Want to join the conversation?

• How is it four fourths?
• 4 fourths is the fraction 4/4. If you do the division, you get 1.

Remember, the denominator of a fraction always tells you how many pieces (in this case fourths) that you need to have one whole unit.

If you have a whole pizza (so 1 pizza) and you cut it into 8 equal slices. Each slice = one eight or 1/8. And all the pieces together = 8 eights = 8/8 = 1 pizza.

Hope this helps.
• how does one be 4/4's
• Because if the denominator (the bottom one) and the numerator (the top one) are the same, it is equal to 1. Hope that helps!
• tysm for making these sorry is your name sal? ty any way ty mean thank you just in case
• Yes, the creator of these videos (and of khan academy), is named Sal Khan
• would 8/4 be 2?
• Yup. If you divide it it would be 8/4 = 2/1 and 2/1 = 2.
• so a 1 doesn't always have to be on the end?😕(•_•)🐻
• Not at all! Remember the number lines from kindergarten? They went to ten or twenty, but those little "<>" marks on the end are called rays, and that means each line can go on forever!
• This is hard Ahhh!
• Okay, since you need help. basically he is saying that it can be ANY NUMBER as long as the Numerator and the Denominator both match! For Example: 12/12 would equal 1. and 3/3 also equals to 1! I hope this helped!
(1 vote)
• Emma said i am funny
• I don’t get it