i'll tell you how to do it.. Step-by-step explanation:i'll tell you how to do it.. 1st question..step 1-- take out the LCM of the DENOMINATORS. LCM of, 5, 8, 6 and 10= 120step 2-- now divide the result with the actual denominator and then multiply the number (by which you got the ANSWER by dividing it) with the numerator..step 3-- arrange them in ascending order2nd questionyou have to do it same like we did we 1st question.. the difference is that, you have to arrange them in descending order3rd questioni. step 1= first convert the denominators of all the fractions into same, by finding out the LCM.LCM of 9, 1 and 7=63step 2= now divide the result with the actual denominator and then multiply the number (by which you got the answer by dividing it) with the numerator..so we'll get,  step 3= now add them, so, we'll get, ii. step 1= first convert the mixed fraction to improper fraction, so we'll get, step 2= now convert the denominators of both the fractions into same, by finding out the LCM. LCM of 4 and 6= 12step 3= now divide the result with the actual denominator and then multiply the number (by which you got the answer by dividing it) with the numerator..so we'll get,  step 4= now subtract them, so, by subtracting these two fractions we'll get----step 5= the answer should also be in mixed fraction because the question was in mixed fraction..so, the final answer will be-- 4th questioni.  Step 1=first convert the denominators of both the fractions into same, by finding out the LCM.LCM of 8 and 6=24Step 2= now divide the result with the actual denominator and then multiply the number (by which you got the answer by dividing it) with the numerator.. and therefore, i hope it helps you..