0.94×3.9+54.3×0.39怎么简算,谁知道
问题描述:
0.94×3.9+54.3×0.39怎么简算,谁知道
答
0.94x3.9+54.3x0.39=(9.4x3.9+54.3x3.9)/10=3.9x(9.4+54.3)/10=3.9x63.7/10=24.843
答
提示:3.9和0.39有什么关系,很明显的了
答
0.94×3.9+54.3×0.39
=0.39×(0.94×10+54.3)
=0.39×(9.4+54.3)
=0.39×63.7
=0.4×63.7-0.637
=25.48-0.637
=24.843