题目内容
3×
-0.5×0.25+0.3÷
= ．
| 1 |
| 4 |
| 4 |
| 5 |
考点：整数、分数、小数、百分数四则混合运算
专题：运算顺序及法则
分析：根据乘法分配律进行简算．
解答：
解：3×
-0.5×0.25+0.3÷
=3×
-0.5×
+0.3×
=3×
-0.5×
+0.3×5×
=3×
-0.5×
+1.5×
=（3×-0.5+1.5）×
=4×
=1．
故答案为：1．
| 1 |
| 4 |
| 4 |
| 5 |
=3×
| 1 |
| 4 |
| 1 |
| 4 |
| 5 |
| 4 |
=3×
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
=3×
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
=（3×-0.5+1.5）×
| 1 |
| 4 |
=4×
| 1 |
| 4 |
=1．
故答案为：1．
点评：考查了运算定律与简便运算，四则混合运算．注意运算顺序和运算法则，灵活运用所学的运算定律简便计算．
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