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b) 2,5*8-6:0,3= 5/2 * 8/1 - 6/1 *10/3 = 20 - 20 = 0
c) -6,38:(4-0,27*3)= - 6,38 : ( 4 - 0,81) = 6,38 : 3,19 = 2
d) (2,4:0,15+0,85)*0,2= (16 + 0,85) * 0,2 = 16,85 * 0,2 = 3,37
e) (9:5/29-1)*0,99= (52,2 - 1) * 0,99 = 51,2 * 0,99 = 50,21
f) 3+(5-1/3*0,7):3= 3+ ( 5 - 7/30) = 3 + ( 150/30 - 7/30) = 3 + 143/30 =3 + 4 23/30 = 7 23/30
g) 6 2/5-(-3 1/10)-(-14/15)= 6 2/5 + 3 1/10 + 14/15 = 6 4/10 + 3 1/10 + 14/15 = 9 5/10 + 6 14/15 = 9 15/30 + 6 28/30 = 15 43/30 = 16 13/30
Wydaje mi się, że jest dobrze.