怎样简便就怎样计算18十35十85十55,25x16,178一68十22,768十382一168十118
18十35十85十55
=18+85+35+55
=103+90
=193
25*16
=25*4*4
=100*4
=400
178-68+22
=110+22
=132
768十382一168十118
=768-168+382+118
=600+500
=1100
18十35十85十55
=18+(35+85+55)
=18+175
=193
25x16
=25×4×4
=100×4
=400