38*(5/17-2/19)*51简便计算
问题描述:
38*(5/17-2/19)*51简便计算
答
38*(5/17-2/19)*51
=38*51*5/17-38*51*2/19
=38*15-2*51*2
=19*6*5-6*17*2
=6(95-34)
=366