2 又 1/2-3/4+3/7 2.3 5/12+1/4-2 2/31.2 1/2-3/4+3/7 2.3 5/12+1/4-2 2/33.3 3/4-3 3/5+4 1/124.12 1/3-26+1/155.8 3/10-21/5+1/2
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 22:27:40
2又1/2-3/4+3/72.35/12+1/4-22/31.21/2-3/4+3/72.35/12+1/4-22/33.33/4-33/5+41/124.121/3-26+1/155.83/10-2
2 又 1/2-3/4+3/7 2.3 5/12+1/4-2 2/31.2 1/2-3/4+3/7 2.3 5/12+1/4-2 2/33.3 3/4-3 3/5+4 1/124.12 1/3-26+1/155.8 3/10-21/5+1/2
2 又 1/2-3/4+3/7 2.3 5/12+1/4-2 2/3
1.2 1/2-3/4+3/7
2.3 5/12+1/4-2 2/3
3.3 3/4-3 3/5+4 1/12
4.12 1/3-26+1/15
5.8 3/10-21/5+1/2
2 又 1/2-3/4+3/7 2.3 5/12+1/4-2 2/31.2 1/2-3/4+3/7 2.3 5/12+1/4-2 2/33.3 3/4-3 3/5+4 1/124.12 1/3-26+1/155.8 3/10-21/5+1/2
1. 2又 1/2-3/4+3/7
=1又3/4+3/7
=2又5/28
2. 3又 5/12+1/4-2 又2/3
=(3又5/12-2又2/3)+1/4
=3/4+1/4
=1
3. 3 又3/4-3又 3/5+4又 1/12
=(3又3/4+4又1/12)-3又3/5
=7又5/6-3又3/5
=4又7/30
4.12又 1/3-2又5/6+1/15
=9又1/2+1/15
=9又17/30
5.8 又3/10-2又1/5+1/2
=6.1+0.5
=6.6