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Solving for the missing fraction

Learn how to add and subtract fractions with unlike denominators. Watch examples, practice finding common denominators, and apply these skills to solve problems.

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• what if the missing fraction is on the right side?
• Well you just add the fractions on the left side
• What is the difference between BEDMAS, BODMAS and PEMDAS?
• B - brackets
E - exponents
D - division
M - multiplication
S - subtraction
• where did he get the 8 at?
• He got the 8 from the 16. Because 16 divided by 2 is 8.
• you have to get common denominator
• what if there are 2 fractions missing?
• If there are two missing fractions, then generally you will need to be given a second equation in order to have enough information to find the two missing fractions.
• What is 2/5 + blank equals 7/10.
• If we had a simpler problem such as 3 + blank = 8, we would do 8-3 = 5.

Similarly, for 2/5 + blank = 7/10, we would do 7/10 - 2/5.

We can use 10 as a common denominator because 5 divides evenly into 10.
Multiplying top and bottom of 2/5 each by 2 gives 4/10, so 2/5 = 4/10.

So the blank is 7/10 - 2/5 = 7/10 - 4/10 = 3/10. The answer is 3/10.

May Jesus richly bless you today!
• i don't really get this i need some help why do we have to change the common denominator
• We need to change it so it's easier to subtract or add.
1/2 + 3/12 is harder because the denominator is not the same. If the denominator was the same, it would be easier. In that case, 1/2 + 3/12 would be 6/12 + 3/12
which is 9/12.
Since making the dinomenator the same, it makes answering the question easier.
Sorry if my grammar is bad, I just started English. (used to go to French immersion)
Hope this helps!
• I honestly still don't get it but what if there is not a question that has two numbers like what I mean is like what if there is a question like -- + 3\4 = 1\2??