78*36-23*36=(78-23)*36=55*36=55*2*18=110*18=1980
(78+36-14)*36=100*36=3600
36/18+36*82=2+36*82=2+82*(40-4)=2+3280-328=3282-328=2954
78*36+ 78*65-78简便运算78*(36+65-1)78*1007800
78*36+7.8*741-7=78*36+78*741/10-7=78*(36+*74.1)-7=78*(100+0.1)-7=7800+7.8-7=7800.8
360*78+220*36=36*78*10+220*36=780*36+220*36=(780+220)*36=1000*36=36000
78x36+39x28=39x(2x36)+39x28=39x72+39x28=39x(72+28)=39x100=3900
236*37*27=235764巧算是37*27=(40-3)X27=1080-81=1000+80-81=1000-12364(1000-1)=236*(1000-1)=236000-236=235764
75*36=3*25*4*9=3*100*9=2700
36*78+36*21+36=36*(78+21+1)=36*100=3600