题目内容
| 脱式计算．（写出计算过程） ①1+0.45÷0.9-0.75 | ②[1-（
| ③（
|
①1+0.45÷0.9-0.75
=1+0.5-0.75
=0.75；
②[1-（
-
）]÷
=[1-
]×
，
=
×
，
=
；
③（
+
）÷
+
=
×
+
，
=
+
，
=
．
=1+0.5-0.75
=0.75；
②[1-（
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 8 |
=[1-
| 1 |
| 6 |
| 8 |
| 5 |
=
| 5 |
| 6 |
| 8 |
| 5 |
=
| 4 |
| 3 |
③（
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 3 |
| 10 |
=
| 21 |
| 20 |
| 3 |
| 7 |
| 3 |
| 10 |
=
| 9 |
| 20 |
| 3 |
| 10 |
=
| 3 |
| 4 |
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