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4/5×5/6÷5/8
=2/3×8/5
=16/15
8/3×9/16-6/17÷9/34
=3/2-4/3
=1/6
(99+9/10)÷9
=99÷9+9/10÷9
=11+1/10
=11.1
13/17×4/5+13/17÷5
=13/17×4/5+13/17×1/5
=13/17×(4/5+1/5)
=13/17×1
=13/17
5/6×3/4÷10/7
=5/8×7/10
=7/16
(6-3/4)÷7/8
=21/4×8/7
=6
=2/3×8/5
=16/15
8/3×9/16-6/17÷9/34
=3/2-4/3
=1/6
(99+9/10)÷9
=99÷9+9/10÷9
=11+1/10
=11.1
13/17×4/5+13/17÷5
=13/17×4/5+13/17×1/5
=13/17×(4/5+1/5)
=13/17×1
=13/17
5/6×3/4÷10/7
=5/8×7/10
=7/16
(6-3/4)÷7/8
=21/4×8/7
=6
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