6分之5+9分之8×9分之5×9分之8 简便计算

分类: 作业答案 • 2021-12-20 11:31:58

问题描述：

答

5/6 + 8/9 × 5/9 × 8/9
=5/6 + 8/9 × (1 + 5/9)
=5/6 + 8/9 × 14/9
=5/6 + 112/81
=135/162 + 224/162
=359/162