3/1+4/3+5/2+7/5+8/7+20/9+21/10+24/11+35/19

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 06:13:37
3/1+4/3+5/2+7/5+8/7+20/9+21/10+24/11+35/193/1+4/3+5/2+7/5+8/7+20/9+21/10+24/11+35/193/1+4/3+5/2+7/5+

3/1+4/3+5/2+7/5+8/7+20/9+21/10+24/11+35/19
3/1+4/3+5/2+7/5+8/7+20/9+21/10+24/11+35/19

3/1+4/3+5/2+7/5+8/7+20/9+21/10+24/11+35/19
1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+19/35
=1/3+3/4+2/5+5/7+7/8+(4/20+5/20)+(3/21+7/21)+ (3/24+8/24)+(5/35+14/35)
=1/3+3/4+2/5+5/7+7/8+1/5+1/4+1/7+1/3+1/8+1/3+2/5+1/7
=1/3*3+(3/4+1/4)+(2/5+1/5+2/5)+(5/7+1/7+1/7)+(7/8+1/8)
=1+1+1+1+1
=5
1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+19/35
=(1/3+3/4+7/8+11/24)+(2/5+9/20)+(5/7+10/21+19/35)
=(8/24+18/24+21/24+11/24)+(8/20+9/20)+(75/105+50/105+57/105)
=29/12+17/20+26/15
=145/60+51/60+104/60
=300/60
=5