问题
填空题
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答案
13×a=a×13 | (57+13)×4=57×4+13×4 |
a×c+b×c=(a+b)×c | (36×25)×4=36×(25×4). |
72×59+28×59=28×59+72×59 | 65×(98-26)=65×98-65×26 |
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13×a=a×13 | (57+13)×4=57×4+13×4 |
a×c+b×c=(a+b)×c | (36×25)×4=36×(25×4). |
72×59+28×59=28×59+72×59 | 65×(98-26)=65×98-65×26 |