13*(3.69-1.8)+1.11*0.13用簡便計算
=0.13*(369-180)+0.13*1.11
=0.13*(189+1.11)
=0.13*(190+0.11)
=1.3*19+0.13*0.11
=24.7+0.0143
=24.7143
簡便計算125+88
120+88=208
208+5=213
(-2)乘以(-88)乘以(-125)等於
(-2)*(-88)*(-125)
=-(2*11)*(8*125)
=-22000