1/2➗[15/11-(14/11+1/5)]的简便计算?
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2020-03-13
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1/2➗[15/11-(14/11+1/5)]
=1/2➗(15/11-14/11-1/5)
=1/2➗(1/11-1/5)
=1/2÷(5/55-11/55)
=1/2÷(-6/55)
=1/2×(-55/6)
=-55/12
=-4又7/12
=1/2➗(15/11-14/11-1/5)
=1/2➗(1/11-1/5)
=1/2÷(5/55-11/55)
=1/2÷(-6/55)
=1/2×(-55/6)
=-55/12
=-4又7/12
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