100.1-903.6*18=?的简便计算
问题描述:
100.1-903.6*18=?的简便计算
答
100.1-903.6*18
=100.1-903.6*(20-2)
=100.1-18072+1807.2
=-18072+1907.3
=-18072+1900+7.3
=-18072-100+2000+7.3
=-16172+7.3
=-16172+10-2.7
=-16164.7