(6 1/3-2 3/8)÷2 3/8
=6 1/3÷2 3/8-2 3/8÷2 3/8
=19/3×8/19-1
=2 2/3-1
=1 2/3
7 1/5÷0.24-2 2/7×0.875
=36/5×25/6-16/7×7/8
=30-2
=28
(6 1/3-2 3/8)÷2 3/8
=6 1/3÷2 3/8-2 3/8÷2 3/8
=19/3×8/19-1
=2 2/3-1
=1 2/3
7 1/5÷0.24-2 2/7×0.875
=36/5×25/6-16/7×7/8
=30-2
=28