\(a.3.52+15.22-26:2\\ 156+330-13\\ =486-13\\ =473\)
\(b.53.2-100:4+23.5\\ =106-25+115\\ =81+115\\ =196\)
A)3.52+15.22-26:2
= 3.25+15x4-26:2
= 75+60-13
=122
B)52.9+50.2-33.3
=125.2-25+8
=225+40.
=265
C)62:9+50.2-33.3
=36:9+100-27.3
=7+100-81
=7+19
= 26