a, (-0,346) + (-12,78)
= - (12,78 + 0,346) = - 13,126
---
b, 24,716 - 327,5 = - (327,5 - 24,716) = -302,784
---
c, 102,34 . 15,3 = 1565,802
---
d, (-25,5) : (-3,4) = 7,5
---
e, 5,31 - (-3,89) . 9,2 = 5,31 + 3,89 . 9,2 = 5,31 + 35,788 = 41,098
---
f, (-7,89) - (-11,7) : 0,03 = -7,89 + 0,39 = -7,5
