Răspuns:
a). (2x3-6) : 9+3x9x10x0x5+6x6=(6-6):9+0+36=0:9+0+36=0+0+36=36
b). (5x10-9x5) x5+35:)2x0x9:7+9:9)=???
cred ca asa era corect
(5x10-9x5)x5+35:(2x0x9:7+9:9)=(50-45)·5+35:(0+1)=5·5+35:1=25+35=60
c). (3x90:10):9+9:(0:5+5x2:10)=
(270:10):9+9:(0+10:10)=27:9+9:(0+1)=3+9:1=3+9=12
