计算：（1）4又3分之2减4分之5加2又5分之3=（2）4又2分之1减（3又5分之2减1又4分之3）=

Question

计算：（1）4又3分之2 减 4分之5 加 2又5分之3= （2）4又2分之1 减 （3又5分之2 减 1又4分之3）=

Answer 1

(1)题：4又2/3-5/4+2又3/5
=4又2/3-1又1/4+2又3/5
=4+2/3-(1+1/4)+2+3/5
=4+2/3-1-1/4+2+3/5
=(4-1+2)+(2/3-1/4+3/5)
=5+(40/60-15/60+36/60)
=5+61/60
=6又1/60
(2)：4又1/2-(3又2/5-1又3/4)
=4又1/2-3又2/5+1又3/4
=(4又1/2+1又3/4)-3又2/5
=(4+1+1/2+3/4)-3-2/5
=(5+2/4+3/4)-3-2/5
=5+5/4-3-2/5
=(5-3)+(5/4-2/5)
=2+25/20-8/20
=2又17/20