a) \(=\left(267+233\right)+\left(154+346\right)=500+500=1000\)
b) \(=38+100:\left[345-\left(45+200\right)\right]=38+100:\left(345-245\right)=38+100:100=38+1=39\)
c) \(=125\left(38+61+1\right)=125.100=12500\)
d) \(=\left(25.4\right).\left(125.8\right)=100.1000=100000\)