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计算-1/2-5又1/5-1+3又1/4-4.5+2又1/3
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计算-1/2-5又1/5-1+3又1/4-4.5+2又1/3
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答案和解析
-1/2-5又1/5-1+3又1/4-4.5+2又1/3
=-1/2+26/5-1+13/4-9/2+7/3
=(-1/2-9/2)+26/5+9/4+7/3
=1/5+9/4+7/3
=12/60+144/60+140/60
=256/60
=4又4/15
=-1/2+26/5-1+13/4-9/2+7/3
=(-1/2-9/2)+26/5+9/4+7/3
=1/5+9/4+7/3
=12/60+144/60+140/60
=256/60
=4又4/15
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