题目内容
计算:
×
+
×(
+
).
| 9 |
| 28 |
| 7 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 6 |
分析:先算
×
和括号内的,原式变为
+
×
,再算乘法,最后算加法.
| 9 |
| 28 |
| 7 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
| 29 |
| 24 |
解答:解:
×
+
×(
+
),
=
+
×
,
=
+
,
=
.
| 9 |
| 28 |
| 7 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 6 |
=
| 3 |
| 4 |
| 2 |
| 3 |
| 29 |
| 24 |
=
| 3 |
| 4 |
| 29 |
| 36 |
=
| 14 |
| 9 |
点评:注意运算顺序和运算法则,是解决本题的关键.
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