6/13*17-12-3/13简算 {8/17+8/13]*13/8*17/8
问题描述：
6/13*17-12-3/13简算 {8/17+8/13]*13/8*17/8
答
利用拆合简算分数
6/13*（13+4）-12-3/13
=6+24/13-12-3/13
=-4又5/13
8/17*13/8*17/8+8/13*13/8*17/8
=13/8+17/8
=30/8
=3又3/4
答
6/13*17-12-3/13
=3/13×(34-1)-12
=3×33/13-12
=57/13
{8/17+8/13]*13/8*17/8
=8/17*13/8*17/8+8/13*13/8*17/8
=13/8+17/8
=15/4
答
6/13*17-12-3/13
=3/13*2*17-12-3/13
=3/13*(34-1)-12
=99/13-156/13
=-57/13
=-4又6/13
8/17+8/13]*13/8*17/8
=8/17*13/8*17/8+8/13*13/8*17/8
=13/8+17/8
=30/8
=3又3/4