（21*3/7+4/7*21）*1/4（99+9/10）÷94/5+5/6÷5/814/15÷[（4/5+2/3）*10/11]（5/6+4/5）*301/3+3÷1/25/6*6/5-9/10÷9/54-5/11-7/111/8*58+1/8*41+1/84/5*4/7*5/4-1/24/5*5/6+2/5÷3/54/5÷[(5/8-1/2)÷5/8]235-135÷183/5*153-0.6*53

（21*3/7+4/7*21）*1/4
=(9+12)*1/4
=21/4
（99+9/10）÷9
=11+1/10
=111/10

4/5+5/6÷5/8
=4/5+4/3
=4（1/5+1/3）
=32/15
14/15÷[（4/5+2/3）*10/11]
=14/15÷（22/15*10/11）
=14/15*3/4
=7/10
（5/6+4/5）*30
=25+24
=49
1/3+3÷1/2
=1/3+6
=19/3
5/6*6/5-9/10÷9/5
=1-9/10*5/9
=1-1/2
=1/2
4-5/11-7/11
=4-1-1/11
=3-1/11
=32/11
1/8*58+1/8*41+1/8
=1/8(58+41+1)
=1/8*100
=25/2
4/5*4/7*5/4-1/2
=4/7-1/2
=1/14
4/5*5/6+2/5÷3/5
=2/3+2/3
=4/3
4/5÷[(5/8-1/2)÷5/8]
=4/5÷（1/8*8/5）
=4/5*5
=4
235-135÷18
=235-45÷6
=235-15÷2
=235-7.5
=228.5
3/5*153-0.6*53
=3/5（153-53）
=3/5*100
=60

（21*3/7+4/7*21）*1/4
=21*(3/7+4/7)*1/4
=21*1/4
=5.25
（99+9/10）÷9
=99÷9+9/10÷9
=11+1/10
=111/10
4/5+5/6÷5/8
=4/5+4/3
=32/15
14/15÷[（4/5+2/3）*10/11]
=14/15÷（14/15*10/11）
=14/15÷28/33
=11/10
（5/6+4/5）*30
=5/6*30+4/5*30
=25+24
=49
1/3+3÷1/2
=1/3+6
=19/3
5/6*6/5-9/10÷9/5
=1-1/2
=1/2
4-5/11-7/11
=4-12/11
=32/11
1/8*58+1/8*41+1/8
=18*（58+41+1）
=1800
4/5*4/7*5/4-1/2
=（4/5*5/4）*4/7-1/2
=4/7-1/2
=1/14
4/5*5/6+2/5÷3/5
=2/3+1/2
=7/6
4/5÷[(5/8-1/2)÷5/8]
=4/5÷（1/8÷5/8）
=4/5÷1/5
=4
235-135÷18
=235-7.5
=227.5
3/5*153-0.6*53
=3/5*（153-53）
=3/5*100
=60
累死我了