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1.11, 2.23, 3.35,4.47, (), 6.71。 A.5.57B.5.58C.5.59 D.5.60
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2/31/22/51/32/7() A.1/4B.1/6C.2/11D.2/9
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2,5,11,23,47,() A.71 B.67 C.97 D.95
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4,0,9,32,72,134,()。 A.156B.198C.225D.256
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2,5,11,23,47,()A.71 B.67 C.97 D.95
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2, 11, 32, 71, 134, ()。A.137 B.187 C.227 D.247
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计算下面各题,能简算的要简算. 4.05-2.8-0.71.25×32×2.5[1-(12-14)]×2399.9×98+(0.8-35)×999.