题目内容
计算:
4.36×2.5+2.5×3.64+5
9
×
÷(9
÷
)
4.36×2.5+2.5×3.64+5
9
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 4 |
| 8 |
| 7 |
考点:小数四则混合运算,分数的四则混合运算
专题:运算顺序及法则
分析:(1)运用乘法分配律简算.
(2)运用除法的性质以及调换运算顺序,使计算简便.
(2)运用除法的性质以及调换运算顺序,使计算简便.
解答:
解:(1)4.36×2.5+2.5×3.64+5
=(4.36+3.64)×2.5+5
=8×2.5+5
=20+5
=25
(2)9
×
÷(9
÷
)
=9
×
÷9
×
=(9
÷9
)×(
×
)
=1×1
=1
=(4.36+3.64)×2.5+5
=8×2.5+5
=20+5
=25
(2)9
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 4 |
| 8 |
| 7 |
=9
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 4 |
| 8 |
| 7 |
=(9
| 1 |
| 4 |
| 1 |
| 4 |
| 7 |
| 8 |
| 8 |
| 7 |
=1×1
=1
点评:完成本题要注意分析式中数据,运用合适的简便方法灵活简算.
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