( - 2 13/48 - ( - 2 5/15 )) : ( - 3 3/4) + 9 3/4 : (-13) =- 23/30
1) - 2 13/48 - (- 2 5/15) = -109/48 + 35/15=
= (-109 *5 +35*16)/240 = (-545 + 560)/240 = 15/240= 1/16
2) 1/16 : (- 3 3/4) = 1/16 : ( - 15/4) = 1/16 * (- 4/15) = -1/60
3) 9 3/4 : (-13) = (39/4) * (-1/13) = - 3/4
4) - 1/60 + (- 3/4) = - ( 1/60 + 45/60) = - 46/60 = -23/30
(1 2/3 - 3,6) : ( - 2 7/9 + 4 1/15) * (-2,6)=3,9
1) 1 2/3 - 3,6 = 5/3 - 18/5 = (25 - 54)/15 = - 29/15 = - 1 14/15
2) - 2 7/9 + 4 1/15 = (- 25*5 + 61*3)/45 = (-125+183)/45=
= 58/45 = 1 13/45
3) - 1 14/15 : 1 13/45 = - 29/15 * 45/58 = - 3/2 = -1,5
4) -1,5 * (-2,6) = 3,9