0.08 *7.5+7/0.56
问题描述：
0.08 *7.5+7/0.56
答
0.08 *7.5+7/0.56
=2/25 × 25 × 0.3 +7/(7×0.08)
=2×0.3+25/2
=0.6+12.5
=13.1