1.15*99+1.15的簡便計算

1.15*99+1.15的簡便計算


1.15*99+1.15
=1.15*(99+1)
=1.15*100
=115



各位幫幫忙45÷3+15×99怎麼簡便運算(先是能不能)?


能.
45÷3+15×99
=15+15×99
=15×(1+99)
=1500



4.5*80%+10分之3*505+0.8計算


4.5*80%+10分之3*505+0.8
=3.6+151.5+0.8
=155.9