3.52-27:32 +52.4-18:32
=3 . 25 - 27 : 9 + 25. 4 - 18 : 9
=75 - 3 + 100 - 2
=(75 - 3) + (100 - 2)
=72 + 98
=170
=3.25-27:9+25.4-18:9
=75-3+100-2
=72+100-2
=170
\(3.5^2-27:3^2+5^2.4-18:3^2\)
\(=5^2\left(3+4\right)-\left(27+18\right):3^2\)
\(=25.7-45:9\)
\(=175-5\)
\(=170\)