题目内容
先观察,再根据规律,把算式填完整.
(1)22-12=3,32-22=5,72-62=13,222-______=______,______-782=______;
(2)
-
=
=
,
-
=
=______,
-
=______=______.
(1)22-12=3,32-22=5,72-62=13,222-______=______,______-782=______;
(2)
| 1 |
| 2 |
| 1 |
| 3 |
| 3-2 |
| 2×3 |
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 7 |
| 7-4 |
| 4×7 |
| 1 |
| 5 |
| 1 |
| 9 |
(1)222-212=43,792-782=157;
(2)
-
=
=
,
-
=
=
.
故答案为:212,43,792,157,
,
,
.
(2)
| 1 |
| 4 |
| 1 |
| 7 |
| 7-4 |
| 4×7 |
| 3 |
| 28 |
| 1 |
| 5 |
| 1 |
| 9 |
| 9-5 |
| 5×9 |
| 4 |
| 45 |
故答案为:212,43,792,157,
| 3 |
| 28 |
| 9-5 |
| 5×9 |
| 4 |
| 45 |
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