题目内容
1001×2
+998
+9
=
| 3 |
| 11 |
| 998 |
| 999 |
| 1 |
| 1000 |
3282
| 998999 |
| 999000 |
3282
.| 998999 |
| 999000 |
分析:根据题目特点,先把原式变为2275+998+
+9+
,然后把整数与整数相加,分数与分数相加,求得结果.
| 999-1 |
| 999 |
| 1 |
| 1000 |
解答:解:1001×2
+998
+9
,
=2275+998+
+9+
,
=(2275+998+1+9)-
+
,
=3283-
+
,
=3283-
,
=3282
.
| 3 |
| 11 |
| 998 |
| 999 |
| 1 |
| 1000 |
=2275+998+
| 999-1 |
| 999 |
| 1 |
| 1000 |
=(2275+998+1+9)-
| 1 |
| 999 |
| 1 |
| 1000 |
=3283-
| 1000 |
| 999000 |
| 999 |
| 999000 |
=3283-
| 1 |
| 999000 |
=3282
| 998999 |
| 999000 |
点评:完成此题,应注意认真观察,运用运算技巧,灵活简算.
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