1.25: (-2/5)+1,75: 1 1/8 (одна целая одна восьмая) =

1) 1,25 : ( - 2/5 ) = 1 1/4 : ( - 2/5 ) = 5/4 : ( - 2/5 ) = - 25/8 = - 3 1/8
2) 1,75 : 1 1/8 = 1 3/4 : 1 1/8 = 7/4 : 9/8 = 14/9 = 1 5/9
3) - 3 1/8 + 1 5/9 = - 2 9/8 + 1 5/9 = - 2 81/72 + 1 40/72 = - 1 41/72
ответ ( - 1 41/72 )