0.027+9.9x0.27简便算法.快.急用是0.027+9.9*0.27 不是X
问题描述:
0.027+9.9x0.27简便算法.
快.急用
是0.027+9.9*0.27 不是X
答
0.027+(10-0.1)*0.27=2.7
答
0.027+9.9x0.27
=0.1x0.27+9.9x0.27
=(0.1+9.9)x0.27
=10x0.27
=2.7
答
0.027+9.9x0.27
=0.27×0.1+9.9×0.27
=0.27×(0.1+9.9)
=0.27×10
=2.7