1-7/9÷7/8 简便计算
问题描述:
1-7/9÷7/8 简便计算
答
1 - 7 / 9 ÷ 7 / 8
= 1 - 7 / 9 × 8 / 7
= 1 - 8 / 9
= 1 / 9