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(-1/42)/(-3/7+5/6-9/14+1/3)=?
题目详情
(-1/42)/(-3/7+5/6-9/14+1/3)=?
▼优质解答
答案和解析
(-1/42)/(-3/7+5/6-9/14+1/3)
=(-1/42)/(-6/14-9/14+5/6+2/6)
=(-1/42)/(-15/14+7/6)
=(-1/42)/(-1-1/14+1+1/6)
=(-1/42)/(-3/42+7/42)
=(-1/42)/(4/42)
=-1/42*42/4
=-1/4
=(-1/42)/(-6/14-9/14+5/6+2/6)
=(-1/42)/(-15/14+7/6)
=(-1/42)/(-1-1/14+1+1/6)
=(-1/42)/(-3/42+7/42)
=(-1/42)/(4/42)
=-1/42*42/4
=-1/4
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