题目内容
(1)
×
×7
=
×7×
=2×
=
______
(2)
×9+
=
×(9+1)
=
×10
=7______.
| 2 |
| 7 |
| 3 |
| 8 |
=
| 2 |
| 7 |
| 3 |
| 8 |
=2×
| 3 |
| 8 |
=
| 3 |
| 4 |
(2)
| 7 |
| 10 |
| 7 |
| 10 |
=
| 7 |
| 10 |
=
| 7 |
| 10 |
=7______.
(1)
| 2 |
| 7 |
| 3 |
| 8 |
=
| 2 |
| 7 |
| 3 |
| 8 |
=2×
| 3 |
| 8 |
=
| 3 |
| 4 |
(2)
| 7 |
| 10 |
| 7 |
| 10 |
=
| 7 |
| 10 |
=
| 7 |
| 10 |
=7.
故答案为:√,√.
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