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1,9,35,91,189,()A.301B.321C.341D.361
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:1 9 35 91 189 () A.361B.341C.321D.301
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9,54,189,468,()。A. 936 B.945 C. 523 D. 657
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6,9,-9,54,-189,()A.300B.441C.666 D.729
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9,54,189,468, ()。A.936 B.945 C.523 D.657
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6,9,-9,54,-189,()A.300B.441C.666D.729
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竖式计算。(1)189×47(2)408×54(3)728÷14(4)903÷21