1) 4 3/4 - 7 = 19/4 - 7 =19/4 - 28/4 = - 9/4 = - 2 1/4
2) 4 2/5 - 6 = 22/5 - 6 =22/5 - 30/5 = - 8/5 = - 1 3/5
3)(- 2 1/4) * 1 1/3 = ( - 9/4) * 4/3 = - 3
4) (- 1 3/5) : 1 1/3 = ( - 8/5) : 4/3 = ( - 8/5) * 3/4 = - 6/5 = - 1 1/5
5) - 3 - 1 1/5 = - 3 - 6/5 =-15/5 - 6)5 = - 21/5 = - 4 1/5
ответ - 4 1/5