题目内容
计算
0.69÷(
+0.9)-(
÷0.45-1
)
0.69÷(
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 5 |
分析:先算
+0.9,和
÷0.45-1
,最后算除和减.
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 5 |
解答:解:0.69÷(
+0.9)-(
÷0.45-1
),
=0.69÷1.15-(
-
),
=0.6-
,
=
.
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 5 |
=0.69÷1.15-(
| 5 |
| 3 |
| 7 |
| 5 |
=0.6-
| 4 |
| 15 |
=
| 1 |
| 3 |
点评:此题考查四则运算的顺序,有括号,先算括号里的,再算括号外面的.
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