有理数的加法
1个回答
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[-5又2/3]+[-4又3/4]+[+2又1/3]+[-6又3/4]
=[-17/3]+[-19/4]+[7/3]+[-27/4] ......先把带分数换成假分数
=[-17/3]+[7/3]+[-19/4]+[-27/4] ......再把同分母的分数归在一起
=[-10/3]+[-46/4]
=[-10/3]+[-23/2] ......把同分母的分数分别相加减并约分
=[-20/6]+[-69/6] ......把分母通分再加减
=-89/6
=-14又5/6
=[-17/3]+[-19/4]+[7/3]+[-27/4] ......先把带分数换成假分数
=[-17/3]+[7/3]+[-19/4]+[-27/4] ......再把同分母的分数归在一起
=[-10/3]+[-46/4]
=[-10/3]+[-23/2] ......把同分母的分数分别相加减并约分
=[-20/6]+[-69/6] ......把分母通分再加减
=-89/6
=-14又5/6
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