简便计算数学题,恩呢我无语
问题描述：
简便计算数学题,恩呢我无语
【ps:】
0.314*82+6.86*8.2
1.18*2.02-1.18*0.02
0.65*9.9+0.065
0.02*35.6*50
【有点多,实在对不起】
答
0.314*82+6.86*8.2
=0.314*82+0.686*82
=82*（0.314+0.686）
=82*1
=82
1.18*2.02-1.18*0.02
=1.18*（2.02-0.02）
=1.18*2
=2.36
0.65*9.9+0.065
=0.65*9.9+0.65*0.1
=0.65*（9.9+0.1）
=0.65*10
=6.5
0.02*35.6*50
=0.02*50*35.6
=1*35.6
=35.6