这是小学五六年级的一道计算题 要求用简便算法计算 希望大家帮我想想 谢谢呢 *^ο^*
第1个回答 2011-12-06
解：3/11×8/9+1/13×2/9-1/13×1/9
=24/11×1/9+1/13×(2/9-1/9)
=24/11×1/9+1/13×1/9
=(24/11+1/13)×1/9
=323/143×1/9
=323/1287
=24/11×1/9+1/13×(2/9-1/9)
=24/11×1/9+1/13×1/9
=(24/11+1/13)×1/9
=323/143×1/9
=323/1287
参考资料：个人记忆
第2个回答 2011-12-06
3/11×8/9+1/13×2/9-1/13×1/9
=3/11×8/9+1/13×（2/9-1/9）
=24/11×1/9+1/13×1/9
=（24/11+1/13）×1/9
=323/143×1/9
=323/1287本回答被提问者采纳
=3/11×8/9+1/13×（2/9-1/9）
=24/11×1/9+1/13×1/9
=（24/11+1/13）×1/9
=323/143×1/9
=323/1287本回答被提问者采纳
第3个回答 2011-12-06
3/11×8/9+1/13×2/9-1/13×1/9
=1/9*(24/11+2/13-1/13)
=1/9*(24/11+1/13)
=1/9*(24*13+11)/11*13
=323/9*11*13
=323/1287
=1/9*(24/11+2/13-1/13)
=1/9*(24/11+1/13)
=1/9*(24*13+11)/11*13
=323/9*11*13
=323/1287
第4个回答 2011-12-16
3/11×8/9+1/13×2/9-1/13×1/9
=3/11×8/9+1/13×（2/9-1/9）
=24/11×1/9+1/13×1/9
=（24/11+1/13）×1/9
=323/143×1/9
=323/1287
=3/11×8/9+1/13×（2/9-1/9）
=24/11×1/9+1/13×1/9
=（24/11+1/13）×1/9
=323/143×1/9
=323/1287
