题目内容
直接写出得数：
（1）9
+99
+999
+
×3=______
（2）5
-
=______
（3）777×9+111×37-______．
（1）9
| 4 |
| 7 |
| 1 |
| 12 |
| 8 |
| 9 |
| 1 |
| 3 |
（2）5
| 1 |
| 12 |
| 1 |
| 2 |
（3）777×9+111×37-______．
（1）9
| 4 |
| 7 |
| 1 |
| 12 |
| 8 |
| 9 |
| 1 |
| 3 |
=（9+
| 4 |
| 7 |
| 1 |
| 12 |
| 8 |
| 9 |
=（9+99+999+1）+（
| 4 |
| 7 |
| 1 |
| 12 |
| 8 |
| 9 |
=1108+1
| 137 |
| 252 |
=1109
| 137 |
| 252 |
（2）5
| 1 |
| 12 |
| 1 |
| 2 |
=5+
| 1 |
| 12 |
| 1 |
| 2 |
=5-
| 1 |
| 2 |
| 1 |
| 12 |
=4
| 1 |
| 2 |
| 1 |
| 12 |
=4
| 7 |
| 12 |
（3）777×9+111×37，
=（111×7）×9+111×37，
=111×63+111×37，
=111×（63+37），
=111×100，
=11100．
故答案为：1109
| 137 |
| 252 |
| 7 |
| 12 |
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