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2022-06-04
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(1)0.5吨:200千克,
=500千克:200千克,
=500:200,
=(500÷100):(200÷100),
=5:2,
0.5吨:200千克,
=500千克÷200千克,
=2.5;
(2)
时:40分,
=48分:40分,
=48:40,
=(48÷8):(40÷8),
=6:5;
时:40分,
=48分÷40分,
=1.2.
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