2.45*9.8的简便算法

2024-12-02 09:26:22
推荐回答(2个)
回答1:

2.45*9.8
=2.45*(10-0.2)
=2.45*10-2.45*0.2
=24.5-0.49
=24.01

望采纳

回答2:

2.45x(10-0.2