简算 7.7×1/5＋0.43×22
问题描述：
简算 7.7×1/5＋0.43×22
答
7.7X1/5+0.43X22
=11X0.7X0.2+0.43X2X11
=11X0.14+11X0.86
=11X(0.14+0.86)
=11X1
=11