巧算 9999×8889+3333×3333 9992+999 91/3+991/3+9991/3+99991/3+22/3.

问题描述:

巧算
9999×8889+3333×3333       9992+999        9

1
3
+99
1
3
+999
1
3
+9999
1
3
+2
2
3

(1)9999×8889+3333×3333
=9999×8889+9999×1111
=9999×(8889+1111)
=9999×10000
=99990000
(2)9992+999
=999×999+999
=999×(999+1)
=999×1000
=999000
(3)9

1
3
+99
1
3
+999
1
3
+9999
1
3
+2
2
3

=9+
1
3
+99+
1
3
+999+
1
3
+9999+
1
3
+2+
2
3

=(9+99+999+9999+2)+(
1
3
+
1
3
+
1
3
+
1
3
+
2
3

=10+100+1000+10000-4+2+2
=11110