Amostra
Gabarito
a) 58 – 23 + 42 =
35 + 42 = 77
b) 41 + 5 = 46
c) 89 – 41 + 42 =
48 + 42 = 90
d) 192 – 121 + 24 =
71 – 24 = 47
e) 100 – 67 – 27 =
33 – 27 = 6
f) 398 + 41 + 45 =
439 + 45 = 484
