题目内容
根据乘法运算定律在横线里填上适当的数.
×
×5=______×______×
(15+
)×15=______×______+______×______
×
+
×
=______×(______+______)
| 2 |
| 5 |
| 2 |
| 7 |
| 2 |
| 7 |
(15+
| 3 |
| 5 |
| 1 |
| 9 |
| 4 |
| 5 |
| 1 |
| 9 |
| 1 |
| 5 |
(1)
| 2 |
| 5 |
| 2 |
| 7 |
| 2 |
| 5 |
| 2 |
| 7 |
(2)(15+
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 15 |
(3)
| 1 |
| 9 |
| 4 |
| 5 |
| 1 |
| 9 |
| 1 |
| 5 |
| 1 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
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