计算:9+6/7+99+6/7+999+6/7+3/7.

问题描述:

计算:9+

6
7
+99+
6
7
+999+
6
7
+
3
7

9+

6
7
+99+
6
7
+999+
6
7
+
3
7

=(999+99+9)+(
6
7
×3+
3
7

=(1000-1+100-1+10-1)+(
3
7
×6+
3
7

=1110-3+
3
7
×(6+1)
=1110-3+
3
7
×7
=1110-3+3
=1110.