题目内容
简便计算:(
+0.75+
+
)÷(3-
).
| 11 |
| 7 |
| 17 |
| 4 |
| 5 |
| 4 |
| 5 |
| 3 |
考点:运算定律与简便运算
专题:运算定律及简算
分析:0.75转化为
,再运用加法结合律进行简算;
| 3 |
| 4 |
解答:
解:(
+0.75+
+
)÷(3-
)
=(
+
+
+
)÷(
-
)
=(
+
)÷
=(
+
)×
=
×
=
| 11 |
| 7 |
| 17 |
| 4 |
| 5 |
| 4 |
| 5 |
| 3 |
=(
| 11 |
| 7 |
| 3 |
| 4 |
| 17 |
| 4 |
| 5 |
| 4 |
| 9 |
| 3 |
| 4 |
| 3 |
=(
| 11 |
| 7 |
| 25 |
| 4 |
| 5 |
| 3 |
=(
| 44 |
| 28 |
| 175 |
| 28 |
| 3 |
| 5 |
=
| 219 |
| 28 |
| 3 |
| 5 |
=
| 657 |
| 140 |
点评:此题考查了学生脱式计算的能力,以及对运算定律的灵活运用能力.
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