如题所述
分数应该写作“分子/分母”,
2/5+(2/3-1/4)
=2/5+2/3-1/4
=24/60+40/60-15/60
=49/60
2/5+(2/3-1/4)
=2/5+2/3-1/4
=24/60+40/60-15/60
=49/60
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第1个回答 2017-06-15
2/5+(2/3-1/4)
=24/60+(40/60-15/60)
=24/60+25/60
=49/60
=24/60+(40/60-15/60)
=24/60+25/60
=49/60