零点六五乘以六点四减六点五乘以零点五四加六十五乘以百分之九怎样用简便方法?

2024-12-14 23:56:33
推荐回答(2个)
回答1:

0.65×6.4-6.5×0.54+65×0.09
=6.5×(0.64-0.54+0.9)
=6.5×1.0
=6.5

回答2:

提取公因数0.65*(6.4-5.4+9)=0.65*10=6.5