题目内容
脱式计算.
+
÷
2-
×
.
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 4 |
| 8 |
| 15 |
| 1 |
| 4 |
(1)
+
÷
,
=
+
×
,
=
+
,
=
;
(2)2-
×
,
=2-
,
=
.
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 3 |
| 8 |
| 4 |
| 3 |
=
| 3 |
| 4 |
| 1 |
| 2 |
=
| 5 |
| 4 |
(2)2-
| 8 |
| 15 |
| 1 |
| 4 |
=2-
| 2 |
| 15 |
=
| 28 |
| 15 |
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