题目内容
1-0.12+
+0.34+
-0.56+
-0.78=
.
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 5 |
| 137 |
| 150 |
| 137 |
| 150 |
分析:通过观察与试算,整数1与小数部分计算的结果为负数,因此把
化为小数,那么小数部分计算的结果就为0.38,然后把0.38化为分数,与
和
进行计算.
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 5 |
解答:解:1-0.12+
+0.34+
-0.56+
-0.78,
=(1-0.12+0.5+0.34-0.56-0.78)+
+
,
=0.38+
+
,
=
+
+
,
=
.
故答案为:
.
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 5 |
=(1-0.12+0.5+0.34-0.56-0.78)+
| 1 |
| 3 |
| 1 |
| 5 |
=0.38+
| 1 |
| 3 |
| 1 |
| 5 |
=
| 19 |
| 50 |
| 1 |
| 3 |
| 1 |
| 5 |
=
| 137 |
| 150 |
故答案为:
| 137 |
| 150 |
点评:完成此题,要注意数的转化,达到简算的目的.
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