题目内容
8
÷[0.375×(7-2
×2
+
)].
| 3 |
| 4 |
| 1 |
| 14 |
| 1 |
| 3 |
| 1 |
| 6 |
分析:完成本题可先将式中的小数化为分数,带分数化为假分数,然后再据四则混合运算法则进行计算.
解答:解:8
÷[0.375×(7-2
×2
+
)]
=
÷[
×(7-
×
+
)],
=
÷[
×(2
+
)]
=
÷[
×
],
=
×
,
=10.
| 3 |
| 4 |
| 1 |
| 14 |
| 1 |
| 3 |
| 1 |
| 6 |
=
| 35 |
| 4 |
| 3 |
| 8 |
| 29 |
| 14 |
| 7 |
| 3 |
| 1 |
| 6 |
=
| 35 |
| 4 |
| 3 |
| 8 |
| 1 |
| 6 |
| 1 |
| 6 |
=
| 35 |
| 4 |
| 3 |
| 8 |
| 14 |
| 6 |
=
| 35 |
| 4 |
| 8 |
| 7 |
=10.
点评:在计算此类含有小数及带分数的算式时,要先将式中的小数及带分数化为真分数或假分数,以便于进行通分、约分.
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