Question

用简便方法计算18×25×40 123×33+74×33

用简便方法计算18×25×40 123×33+74×33

Answer 1

18x25x40=18x(25x40)=18x1000=18000
123x33+74x33=(123+74)x33=197x33=(200-3)x33=6600-99=6501

Answer 2

18×25×40
=18*（25*40）
=18*1000
=18000
123×33+74×33
=33*（123+74）培轿脊帆散
=33*197
=33*（配渗200-3）
=33*200-33*3
=6600-99
=6501