8又1/3-(2+3又1/8×4/5) ÷3又3/4
=8又1/3-(2+25/8×4/5) ÷15/4
=8又1/3-(2+5/2)×4/15
=8又1/3-9/2×4/15
=8又1/3-6/5
=8-1+(1/3-1/5)
=7+(5-3)/15
=7又2/15
八又1/3一(2十3又1/8x4/5)/三又3/4
=8又1/3-(2+25/8*4/5)*4/15
=8又1/3-(2+5/2)*4/15
=8又1/3-9/2*4/15
=8又1/3-6/5
=8又1/3-1又1/5
=7又2/15
8又1/3-(23又1/8x4/5)÷三又3/4
=25/3-(185/8)x(4/5)÷(15/4)
=25/3-(37/2)x(4/15)
=25/3-74/15
=125/15-74/15
=51/15
=17/5
=3又5分之2
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