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3.6*31又5分之2+43.9*6又5分之2
人气:359 ℃ 时间:2020-04-20 02:57:44
解答
3.6*31又5分之2+43.9*6又5分之2
=3.6*31+43.9*6+3.6*2/5+43.9*2/5
=6*18.6+43.9*6+(3.6+43.9)*2/5
=6*(18.6+43.9)+47.5*2/5
=6*62.5+19
=375+19
=394
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