1.2÷[(5/6+1/2)×1/2]有没有简便算法？
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1.2÷[(5/6+1/2)×1/2]
=1.2÷(5/6+1/2)÷1/2
=6/5÷(5/6+3/6)×2
=6/5÷8/6×2
=6/5×6/8×2
=6/5×3/4×2
=3/5×3
=9/5
=1.8
=1.2÷(5/6+1/2)÷1/2
=6/5÷(5/6+3/6)×2
=6/5÷8/6×2
=6/5×6/8×2
=6/5×3/4×2
=3/5×3
=9/5
=1.8
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