13/18除以(5/6+2/3乘3/8)
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13/18除以(5/6+2/3乘3/8)
13/18除以(5/6+2/3乘3/8)
13/18除以(5/6+2/3乘3/8)
=13/18÷(5/6+16/9)
=13/18÷47/18
=13/47
13/18÷(5/6+2/3×3/8)=13/18÷(5/6+1/4)=13/18÷(10/12+3/12)
=13/18÷13/12=13/18×12/13=12/18=2/3
13/18÷(5/6+1/4)
=13/18÷13/12
=13/18x12/13
=2/3