问题
解答题
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答案
325+75=400; | 960-450=510; | 500+264=764; |
839-139=700; | 1400+800=2200; | 3100-300=2800; |
6400+600=7000; | 7900-7000=900. |
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325+75=400; | 960-450=510; | 500+264=764; |
839-139=700; | 1400+800=2200; | 3100-300=2800; |
6400+600=7000; | 7900-7000=900. |