[1-(1/5+2/3)×4/13]÷11/20
问题描述:
[1-(1/5+2/3)×4/13]÷11/20
(1/8+1/6)÷5/24-2/3×1/4
答
【1-(1/5+2/3)*4/13】/ 11/20
=(1-13/15x4/13)x20/11
=(1-4/15)x20/11
=11/15x20/11
=4/3
(1/8+1/6)/5/24-2/3*1/4
=7/24x24/5-1/6
=7/5-1/6
=42/30-5/30
=37/30
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