35-35×0.89怎样简便计算?

2025-01-26 18:02:38
推荐回答(2个)
回答1:

解:35-35×0.89等于( 77/20 ),【即等于3.85】
∵已知需求出35-35×0.89等于多少
A - A × B = A × (1 - B)
∴35 - 35 × 0.89
= 35 × (1 - 0.89)
= 35 × (100/100 - 89/100)
= 35 × 11/100
= 77/20
= 3.85
答:35-35×0.89等于77/20,【即等于3.85】

回答2:

36-35×0.89
=36-35×(1-0.11)
=36-35+35×0.11
=1+3.85
=4.85