题目内容
脱式计算
①23-
×
÷
②
+(
-
)÷
.
①23-
| 8 |
| 9 |
| 3 |
| 8 |
| 1 |
| 27 |
②
| 15 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:①先算乘法,再算除法,最后算减法;
②先算减法,再算除法,最后算加法.
②先算减法,再算除法,最后算加法.
解答:
解:①23-
×
÷
=23-
÷
=23-9
=14;
②
+(
-
)÷
=
+
÷
=
+
=
.
| 8 |
| 9 |
| 3 |
| 8 |
| 1 |
| 27 |
=23-
| 1 |
| 3 |
| 1 |
| 27 |
=23-9
=14;
②
| 15 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 16 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 8 |
=
| 21 |
| 16 |
点评:此考查了四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
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