题目内容
| a×12= | b×b= | a×b= | x×y×7= |
| 5×x= | 2×c×c= | 7x×5= | 2×a×b= |
| a×12=12a | b×b=b2 | a×b=ab | x×y×7=7xy |
| 5×x=5x | 2×c×c=2c2 | 7x×5=35x | 2×a×b=2ab |
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题目内容
| a×12= | b×b= | a×b= | x×y×7= |
| 5×x= | 2×c×c= | 7x×5= | 2×a×b= |
| a×12=12a | b×b=b2 | a×b=ab | x×y×7=7xy |
| 5×x=5x | 2×c×c=2c2 | 7x×5=35x | 2×a×b=2ab |