先算括号里面,40%=4/10=2/5,
1/2+1/3+2/5=15/30+10/30+12/30=37/30
36*37/30=6*37/5=222/5=44.4
=36x(5/6-0.4)
=36x5/6-36x0.4
=30-14.4=15.6
=36*(3/6+2/6—40/100)=36*(5/6—2/5)=36*(25/30—12/30)=36*13/30=78/5
36×(3/6+2/6-4/10)
=36×(5/6-2/5)
=36×(25/30-12/30)
=36×13/30
=6×13/5
=78/5