问题
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81,64,121,36,(),16 A.144B.169C.196D.25
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81,64,121,36,(),16 A.144 B.169 C.196 D.25
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1,4,9,25,64,()。A.81B.100C.121 D.169
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1,4,9,25,64,()。A.81 B.100 C.121 D.169
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连一连。①15×50②12×70③360×20④35×20⑤12×80 A.36×200B.140×5C.30×25D.240×4E.140×6
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9 25 49 81 ( )。 A. 100 B. 121 C. 169 D. 196