15 and 25 least common multiple im confused on this 3/7+6/11= 1/3 + 3/4= 4/5 + 3/7= 7/12-1/8= 9/10 -2/3= i can get the answers i just need some one to do an addtion one and subtracting one and show me how

If you want to add or subtract fractions :

1- make sure that the denominators of the fractions are equal. if they are not, then multiply each of them by a number so that they will be equal.

2- add or subtract the numerators.(if you already had multiplied the denominator of a fraction by a number, then you should multiply the numerator by the same number and do the adding or subtracting)

3- simplify it's possible

here are the answers :











good luck

You're doing something i dont know how to do but search up on google slope calculator maybe that will get you there