题目内容
计算下面各题
(1)
+
+
(2)
+
+
(3)6+
+
.
(1)
| 1 |
| 10 |
| 1 |
| 100 |
| 1 |
| 1000 |
(2)
| 3 |
| 10 |
| 3 |
| 100 |
| 3 |
| 1000 |
(3)6+
| 6 |
| 10 |
| 6 |
| 100 |
考点:分数的加法和减法
专题:运算顺序及法则
分析:(1)(2)(3)把分数化为小数再进行计算即可.
解答:
解:(1)
+
+
=0.1+0.01+0.001
=0.111;
(2)
+
+
=0.3+0.03+0.003
=0.333;
(3)6+
+
=6+0.6+0.06
=6.66.
| 1 |
| 10 |
| 1 |
| 100 |
| 1 |
| 1000 |
=0.1+0.01+0.001
=0.111;
(2)
| 3 |
| 10 |
| 3 |
| 100 |
| 3 |
| 1000 |
=0.3+0.03+0.003
=0.333;
(3)6+
| 6 |
| 10 |
| 6 |
| 100 |
=6+0.6+0.06
=6.66.
点评:根据分数特点,把分数化为小数计算是计算此类题目的关键.
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