Вычислите. 1/2-0,3, - 2/3+0,1,-2/7*1,4,0,48: (-12/13)

-2 1/4+1,7, 1 1/3-3,3, 1 1/5 * (-2,5), - 3,25:2 1/2

Умоляю помогите '_'

1/2-0,3 = 1/2 - 3/10 = 5/10 - 3/10 = 2/10 = 1/5,

-2/3+0,1 = - 2/3 + 1/10 = - 20/30 + 3/30 = - 17/30

-2/7*1,4 = - 2/7 * 14/10 = - 2/5

0,48: (-12/13) = 48/100 * (-13/12) = - 52/100 = - 13/25

-2 1/4+1,7 = - 2 1/4 + 1 7/10 = - 2 5/20 + 1 14/20 = - 11/20

1 1/3-3,3 = 1 1/3 - 3 3/10 = 1 10/30 - 3 9/30 = - 1 29/30

1 1/5 * (-2,5) = 1 1/5 * (-2 5/10) = 6/5 * (-5/2) = - 3

-3,25:2 1/2 = - 3 1/4 : 2 1/2 = - 13/4 * 2/5 = - 13/10 = - 1 3/10