Question

1/4+7/12+2/3 sum using or difference by using benchmarks

Answer 1

I do not know what benchmarks are, but I can solve this if you want me too...but it might not be the correct way that you need. Do you want me to show you how I do it ?

Answer 2

you have to make them have the same denominators when adding or subtracting fractions.
The common denominator of 4,12,and 3 is 12.
1/4 = 3/12
7/12 = 7/12
2/3 = 8/12

so now we have :
3/12 + 7/12 + 8/12 = 18/12 which reduces to 3/2 or in mixed number form = 1 1/2