a: \(312,42+18,538+108,3\)
\(=\left(312,42+108,3\right)+18,538\)
\(=420,72+18,538=439,258\)
b: \(205,3+179,35+217,002\)
\(=\left(205+179+217\right)+\left(0,3+0,35+0,002\right)\)
\(=601,652\)
c: \(531,07-218,045\)
\(=\left(531-218\right)+\left(0,07-0,045\right)\)
\(=313,025\)
d: \(85,051-9,7=85+0,51-9-0,7\)
=76-0,19
=75,81
e: \(605,15\cdot32,7\)
\(=605,15\left(32+0,7\right)\)
\(=605,15\cdot32+605,15\cdot0,7\)
=19364,8+423,605
=19788,405
f: \(2764,056:12,72\)
\(=2764056:12720\)
=217,3
e: \(E=172,56-35,32-72,56+4,37-\left(5,37-5,32\right)\)
\(=\left(172,56-72,56\right)-35,32+4,37-5,37+5,32\)
\(=100-30-1=69\)
f: \(F=3\left(32,1-6,32\right)+7\cdot32,1+3\cdot0,32\)
\(=3\cdot32,1-3\cdot6,32+7\cdot32,1+3\cdot0,32\)
\(=32,1\left(3+7\right)-3\left(6,32-0,32\right)\)
\(=321-18=303\)
