题目内容
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×
×
.分析:在计算
×7÷
×7时,把除法改为乘法,约分计算,计算出结果,再进行判断.
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解答:解:
×7÷
×7,
=
×7×
×7,
=49.
故答案为:×.
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| 3 |
| 2 |
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=
| 2 |
| 3 |
| 3 |
| 2 |
=49.
故答案为:×.
点评:此题错误的原因在于没有按运算顺序进行计算.
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