0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/07 09:36:05
0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算

0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算
0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算

0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算
化为分数,即
1/10*2/10*3/10*4*10*5/10*6/10*7/10*8/10*9/10
=1/10*1/5*3/10*1/5*3/5*7/10*2/5*9/5
=1/10*1/5*3/10*1/5*3/5*7/5*1/5*9/5
=(81*7)/(25*25*25*100)
=567/1562500
=0.00036288