8.42+8.67+8.58+8.50 简便计算
问题描述：
8.42+8.67+8.58+8.50 简便计算
答
34.17
答
=34.17
答
=(8.42+8.58)+(8.67+8.50)
=17+17.17
=34.17
答
8.42+8.67+8.58+8.50
=8.42+8.58+8.50 +8.50+0.17
=17+17+0.17
=34.17