Introduction: How to Add Fractions
Hi everyone. i have noticed all of you to be struggling with adding fractions so i will show you a method you can use to solve these sums
Step 1: Lets Start
First, the fraction shown here is 2/4 + 1/4. We will get the answer to this sum.
Step 2: Denominators and Numerators
The denominator is the number at the bottom of the fractions. the numerator is on the top. The denominator usally stays the same in most sums but we will look at different denominator sums later.
Step 3: Denominator
Like we said last step, in the answer will stay the same in the final sum
Step 4: Finish
After that you just add the top numbers, in this case 2 and 1 so 2+1=3
Step 5: Now Try This
(remember top plus top)
Step 6: Different Denominators
Easy right? this will give your brain a hard time.
Step 7: Start
First, you find the lowest common denominator which is the lowest number that both denominatorsgo into
Step 8: Getting the Denominator
Now, the lowest common denominator is 15 so that goes into our final sum
Step 9: Confusion
Now, as labled, you have to times 5*3 and 15*1 because what you do to the bottom must be able to do it on the top so because 5 was timesed by 3 you have to times the diagonally oppisite number
Step 10: Now
Now that you have timed 2 by 1 and 3 by 3, you get the answers of the numerators (top ones)
Step 11: Congrats
i hope everyone understood what i made lol
Step 12: The Holy Answer
Step 13: Simplify?
What if you wanted your super complex answer to be able to be read by everybody?
Step 14: Keep Dividing
keep dividing the top and bottom by 2 until one of them reatches a point where it goes into decimals
4 years ago
You might want to finish your instrutable by explaining what you do when your answers numerator is larger than its denominator. You're doing a great job explaining this otherwise.
4 years ago on Step 5
2/3+2/9 = (2*3)/(3*3)+2/9 and not 2/(3*3)+2/9
if you multiply the denominator, you have to multiply the same way the numerator
and i'm ok with what steve12 says below
2/5+3/15 = (2*3)/(5*3)+3/15 = 6/15+3/15 = (6+3)/15 = 9/15
OR you can simplify 3/15 and made it easier :
2/5+3/15 = 2/5+(3*1)/(3*5)
you remove the 3*
2/5+1/5 = (2+1)/5=3/5