Resposta:
a) 9.331.222; b) 28.807; c) 8.112.312; d) 76.031.984.
Explicação passo a passo:
a) 8.754.326
+ 576.896
9.331.222
b) 68.765
-39.878
28.807
c) 8.700.010
- 587.698
8.112.312
d) 76.532.001
- 500.017
76.031.984
