5/18*13/5+13/18除以5/13
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5/18*13/5+13/18除以5/13
5/18*13/5+13/18除以5/13
5/18*13/5+13/18除以5/13
=5/18*13/5+13/18*13/5
=(5/18+13/18)*13/5
=1*13/5
=13/5
5/18*13/5+13/18除以5/13
=5/18*13/5+13/18*13/5
=(13/5)*(5/18+13/18)
=(13/5)*1
=13/5
5/18*13/5+13/18除以5/13
=5/18*13/5+13/18*13/5
=(13/5)*(5/18+13/18)
=(13/5)*1
=13/5