Răspuns:
A=(25+5x10)-5
A=(25+50)-5
A=75-5
A=70
B=25+6x(30-100:4)-9x5
B=25+6x(30-25)-9x5
B=25+6x5-9x5
B=25+30-45
B=55-45
B=10
C=20-5:[2-15:(18-3)]x4
C=20-5:(2-15:15)x4
C=20-5:(2-1)x4
C=20-5:1x4
C=20-5x4
C=20-20
C=0
a)
70+10+0=80
b) 3xA+2x(B+C)
3x70+2x(10+0)
3x70+2x10
210+20
230