求 15.27*7.66-9.27*7.66+15.27*2.34-9.27*2.34简算法
问题描述:
求 15.27*7.66-9.27*7.66+15.27*2.34-9.27*2.34简算法
答
15.27*7.66-9.27*7.66+15.27*2.34-9.27*2.34
= (15.27-9.27)*7.66+ 15.27-9.27)*2.34
= 6*7.66 + 6*2.34
= 6*(7.66+2.34)
=6*10
=60