题目内容
计算，能简算的要简算．
×
+0.75×
÷[（
-
）×3]．
| 3 |
| 4 |
| 2 |
| 9 |
| 5 |
| 9 |
| 7 |
| 20 |
| 5 |
| 6 |
| 2 |
| 3 |
（1）
×
+0.75×
=
×
+
×
=
×（
+
）
=
×
=
；
（2）
÷[（
-
）×3]
=
÷[
×3]
=
÷
=
×2
=
．
| 3 |
| 4 |
| 2 |
| 9 |
| 5 |
| 9 |
=
| 3 |
| 4 |
| 2 |
| 9 |
| 3 |
| 4 |
| 5 |
| 9 |
=
| 3 |
| 4 |
| 2 |
| 9 |
| 5 |
| 9 |
=
| 3 |
| 4 |
| 7 |
| 9 |
=
| 7 |
| 12 |
（2）
| 7 |
| 20 |
| 5 |
| 6 |
| 2 |
| 3 |
=
| 7 |
| 20 |
| 1 |
| 6 |
=
| 7 |
| 20 |
| 1 |
| 2 |
=
| 7 |
| 20 |
=
| 7 |
| 10 |
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