А) 1 1/4 - 1/3 = 1 3/12 - 4/12 = 15/12 - 4/12 = 11/12Общий знаменатель 1212 : 4 = 3 - доп.множ. к 1/4 = (1*3)/(4*3) = 3/1212 : 3 = 4 - доп.множ. к 1/3 = (1*4)/(3*4) = 4/12Б) 1 1/3 - 5/6 = 1 2/6 - 5/6 = 8/6 - 5/6 = 3/6 = 1/2Общий знаменатель 66 : 3 = 2 - доп.множ. к 1/3 = (1*2)/(3*2) = 2/63/6 = 1/2 - сократили на 3В) 3 1/8 - 1/6 = 3 3/24 - 4/24 = 2 27/24 - 4/24 = 2 23/24Общий знаменатель 2424 : 8 = 3 - доп.множ. к 1/8 = (1*3)/(8*3) = 3/2424 : 6 = 4 - доп.множ. к 1/6 = (1*4)/(6*4) = 4/24Г) 13 1/24 - 1 11/16 = 13 2/48 - 1 33/48 = 12 50/48 - 1 33/48 = 11 17/48Общий знаменатель 4848 : 24 = 2 - доп.множ. к 1/24 = (1*2)/(24*2) = 2/4848 : 16 = 3 - доп.множ. к 11/16 = (11*3)/(16*3) = 33/48Д) 13 1/8 - 10 3/16 = 13 2/16 - 10 3/16 = 12 18/16 - 10 3/16 = 2 15/16Общий знаменатель 1616 : 8 = 2 - доп.множ. к 1/8 = (1*2)/(8*2) = 2/16Е) 16 2/25 - 12 2/15 = 16 6/75 - 12 10/75 = 15 81/75 - 12 10/75 = 3 71/75Общий знаменатель 7575 : 25 = 3 - доп.множ. к 2/25 = (2*3)/(25*3) = 6/7575 : 15 = 5 - доп.множ. к 2/15 = (2*5)/(15*5) = 10/75