18.9-0.9×20=?要简便计算
问题描述:
18.9-0.9×20=?要简便计算
答
18.9-0.9×20
=18.9-18
=0.9
18.9-0.9×20=?要简便计算
18.9-0.9×20
=18.9-18
=0.9