题目内容
在横线里填上适当的数.
(1)
+______=1
(2)
-______=
(3)______+
=
(4)______-
=
.
(1)
| 2 |
| 7 |
(2)
| 9 |
| 13 |
| 3 |
| 13 |
(3)______+
| 2 |
| 15 |
| 10 |
| 15 |
(4)______-
| 5 |
| 11 |
| 3 |
| 11 |
(1)因为1-
=
,
所以
+
=1
(2)因为
-
=
,
所以
-
=
,
(3)因为
-
=
,
所以
+
=
(4)因为
+
=
,
所以
-
=
;
故答案为:
,
,
,
.
| 2 |
| 7 |
| 5 |
| 7 |
所以
| 2 |
| 7 |
| 5 |
| 7 |
(2)因为
| 9 |
| 13 |
| 3 |
| 13 |
| 6 |
| 13 |
所以
| 9 |
| 13 |
| 6 |
| 13 |
| 3 |
| 13 |
(3)因为
| 10 |
| 15 |
| 2 |
| 15 |
| 8 |
| 15 |
所以
| 8 |
| 15 |
| 2 |
| 15 |
| 10 |
| 15 |
(4)因为
| 3 |
| 11 |
| 5 |
| 11 |
| 8 |
| 11 |
所以
| 8 |
| 11 |
| 5 |
| 11 |
| 3 |
| 11 |
故答案为:
| 5 |
| 7 |
| 6 |
| 13 |
| 8 |
| 15 |
| 8 |
| 11 |
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