写出下面比例(1)3.5 ____20_____ 0.7_____ 4 ________________________
写出下面比例
(1)3.5 ____20_____ 0.7_____ 4
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(2)24 _____36______ 48______ 72
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(3)2/3 _____1/4 ______3/8______ 1
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(4)7.2______ 4.8______ 3_______ 2
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