3/5×1/7×6/13+5/7×1/5×3/13+1/13×3/7×2/5简便计算是多少

题目详情

3/5×1/7×6/13+5/7×1/5×3/13+1/13×3/7×2/5 简便计算是多少

▼优质解答

答案和解析

原式=(3×6)/(5×7×13)+(5×3)/(5×7×13)+(3×2)/(5×7×13)
=3/(5×7×13)×(6+5+2)
=3/(5×7×13)×13
=3/(5×7)
=3/35

看了3/5×1/7×6/13+5/...的网友还看了以下：