5.9×4.8+59×0.42+5.
问题描述：
5.9×4.8+59×0.42+5.
答
5.9×4.8+59×0.42+5.9
=5.9×4.8+5.9×4.2+5.9×1
=5.9×(4.8+4.2+1)
=5.9×10
=59不客气