题目内容
计算.
(1)
+
+
(2)1-
-
(3)
-
-
(4)
+
+
.
(1)
| 25 |
| 43 |
| 15 |
| 43 |
| 3 |
| 43 |
(2)1-
| 13 |
| 16 |
| 2 |
| 16 |
(3)
| 20 |
| 25 |
| 7 |
| 25 |
| 12 |
| 25 |
(4)
| 2 |
| 15 |
| 4 |
| 15 |
| 5 |
| 15 |
(1)
| 25 |
| 43 |
| 15 |
| 43 |
| 3 |
| 43 |
=
| 25+15+6 |
| 43 |
=
| 46 |
| 43 |
(2)1-
| 13 |
| 16 |
| 2 |
| 16 |
=
| 16-13-2 |
| 16 |
=
| 1 |
| 16 |
(3)
| 20 |
| 25 |
| 7 |
| 25 |
| 12 |
| 25 |
=
| 20-7-12 |
| 25 |
=
| 1 |
| 25 |
(4)
| 2 |
| 15 |
| 4 |
| 15 |
| 5 |
| 15 |
=
| 2+4+5 |
| 15 |
=
| 11 |
| 15 |
练习册系列答案
相关题目