731-74+26+43的简便运算
731-74+26+43
=(731+26+43)-74
=800-74
=726
或者
731-74+26+43
=(731+43)-74+26
=774-74+26
=700+26
=726
731-74+26+43
=(731+43)-74+26
=774-74+26
=700+26
=726
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731-74+26+43
=(731+26+43)-74
=800-74
=726
或者
731-74+26+43
=(731+43)-74+26
=774-74+26
=700+26
=726
731-74+26+43
=(731+43)-74+26
=774-74+26
=700+26
=726