题目内容
2015
-2014
+2013
-2012
+…+1
-
.
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
原式=(2015
-2014
)+(2013
-2012
)+…+(1
-
)=1
+1
+…+1
=1008×
=1176.
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
6 |
1 |
6 |
1 |
6 |
=1008×
7 |
6 |
=1176.
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