5.74*1.8\0.2de簡便計算

5.74*1.8\0.2de簡便計算

5.74*1.8/0.2
= 5.74*1.8*5 /(0.2*5)
= 5.74*9
= 5.74*(10-1)
= 5.74*10 - 5.74
= 57.4 - 5.74
= 51.66