=5*360-360/24计算
先5x360
=5X（300+60）
=5X300+5x60先乘再加
=1500+300
=1800
=再把360/24除以4/4
=360/4=90
=24/4=6
=360/24=90/6再除以3/3
=90/3=30
=6/3=2
=90/6=30/2
=15
=后1800-15
=1785。
5×360-360÷24简便
简便是 5x360-1/24 x 360=(5- 1/24)x360=(120-1)x360/24=(120-1)x15=1800-15=1785