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191问答库 > 3⼀4+1⼀2-3⼀10简便 2⼀3-4⼀7+5⼀6简便 7⼀8-1⼀12+5⼀6简便

3⼀4+1⼀2-3⼀10简便 2⼀3-4⼀7+5⼀6简便 7⼀8-1⼀12+5⼀6简便

2025-03-16 08:50:12

推荐回答（1个）

回答1：

1，原式=5/4-3/10
=25/20-36/20
=19/20
2，原式=9/6-4/7
=63/42-24/42
=41/42
3，原式=21/24+20/24-1/12
=41/24-2/24
=39/24
=1又15/24

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