Steps to subtracting fractions
What is this lesson based on?
Subtracting Fractions
Do the numerators need to be the same while subtracting fractions?
Nope!
8/6 - 4/5
8/15
7/3 - 1/2 =?
1 5/6
Jacob is 5/6 tall he wonders how tall he would be if he subtracted 1/4. How would you solve this?
You would subtract 5/6 - 1/4, once you have done that your answer should be: 7/12.
Lastly, what is the last/ third step?
Simplify the fraction. (Only if needed)
What is a fraction?
A whole that has been divided into equal parts.
5/6 - 2/3 =?
1/6
4/2 - 1/3 =?
1 2/3
Steven says that 4/3 is bigger than 2/3.
But, Ashlee says that 2/3 is bigger than 4/3.
Who is correct and who is wrong?
Ashlee is incorrect, so Steven is correct.
What is the first step of subtracting fractions?
Finding the common denominator!
EX:
2 4 6 8 10 12
3 6 9 12 15 18
When you see the numbers when you're gonna start doing the math, do the denominators need to be the same?
Nope.
9/10 - 1/2 =?
2/5
2/1 - 1/2 =?
1 1/2
Chris eats 3/5 of a pizza. Kristy eats 2/5 of a pizza. Who ate more?
Chris.
What is the second step of Subtracting Fractions?
Subtract the numerators and put the answer over the same denominator.
Do you always need to simplify?
No, only if you need to!
3/6 - 1/3 = ?
1/6
5/2 - 1/4 =?
2 1/4
What is bigger?
50/10 or 5/8
5/8
Do you always need to simplify at the end?
Yes or No
No
What are the steps of Subtracting Fractions?
First step: Find common denominators.
Second step: Subtract the numerators and put the answer over the same denominator.
Last step!: Simplify if needed.
3/4 - 1/2 = ?
1/4
10/5 - 6/7 =?
1 1/7
Peppa caught a fish 4/2 long. Peppa's little brother Jorge caught a fish 5/4 long, Jorge says he wants to subtract the answers. Jorge said the correct answer is 3/4. So Peppa subtracts and says that it's -3/4. Who is correct?
Peppa.