问题
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1 9 18 29 43 61 ()A、82B、83C、84D、85
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1,9,18,29,43,61,() A.82 B.83 C.84 D.85
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17, 19, 36, 37, 73,84, ()。A.96 B.157 C.161 D.177
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1,4,29,84,177,316,()。A.668B.451C.575 D.509
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竖式计算。(1)405×60=(2)768÷16=(3)225×36=(4)365×84=(5)535÷29=(6)820÷70=
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8,23,27,80,84,251,255,()A.764B.668C.686D.866