0.52*79*0.4用简便方法计算
问题描述:
0.52*79*0.4用简便方法计算
答
0.52*79*0.4
=0.52*0.4*79
=0.208*79
=0.208*(80-1)
=0.208*80-0.208
=16.64-0.208
=16.432