191问答库 > 三、怎么算简便就怎样算。 1⼀4+3⼀7+4⼀7+3⼀4 2. 8⼀9-1⼀4+1⼀2 3. 3⼀8+5⼀6+5⼀8 4. 2-1⼀8-7⼀8 5. 1+3⼀4-7⼀12

三、怎么算简便就怎样算。 1⼀4+3⼀7+4⼀7+3⼀4 2. 8⼀9-1⼀4+1⼀2 3. 3⼀8+5⼀6+5⼀8 4. 2-1⼀8-7⼀8 5. 1+3⼀4-7⼀12

2025-04-04 02:05:40

推荐回答（1个）

回答1：

1/4+3/7+4/7+3/4
=1/4+3/4+3/7+4/7
=(1/4+3/4)+(3/7+4/7)
=1+1==2

2. 8/9-1/4+1/2
=8/9+(1/2-1/4)
=8/9+1/4
=32/36+9/36
=41/36

3. 3/8+5/6+5/8
=(3/8+5/8)+5/6
=1+5/6
=11/6

4. 2-1/8-7/8
=2-(1/8+7/8)
=2-1
=1

5. 1+3/4-7/12
=1+9/12-7/12
=1+1/6
=7/6
6. 5/8+1/4-3/4
=5/8-1/2
=5/8-4/8
=1/8