5:13=
(     )52
=(5-4):
2.6
2.6
分析:解答此題的關(guān)鍵是明確5:13,寫成分?jǐn)?shù)是
5
13
=
5×4
13×4
=
20
52
;5-4=1,所以5:13=(5÷5):(13÷5)=1:2.6,據(jù)此即可填空.
解答:解:根據(jù)題干分析可得:
5:13=
20
52
=(5-4):2.6,
故答案為:20;2.6.
點(diǎn)評:此題考查了比與分?jǐn)?shù)的關(guān)系的靈活應(yīng)用及其基本性質(zhì).
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