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1,4,3,12,12,48,25,() A.50;B.75;C.100;D.125
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1,4,3,12,12,48,25,() A.50;B.75;C.100;D.125
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34 、 3,5,10,25,75 ,(), 875A 125 B 250 C 275 D 350
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3,5,10,25,75,(),875 A 125 B 250 C 275 D 350
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-3,-16,-27,O,()。 A.75 B.125 C.25 D.-25
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1,0.5,0.25,0.125,() A.0.75 B.O.725 C.O.0625 D.0.05
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(1)3.75÷0.5=37.5÷()(2)125÷5=1.25÷()(3)63÷6=()÷0.6(4)9.8÷2.5=()÷0.25