2⼀12*14+2⼀12*16+1⼀16*18+1⼀20

2024-12-16 14:05:34
推荐回答(3个)
回答1:

2/12*14+2/14*16+2/16*18+2/18*20
=1/12-1/14+1/14-1/16+1/16-1/20
=1/12-1/20
=1/30

回答2:

原式=7/3+8/3+9/8+1/20
=16+1/8+1/20
=16+7/40

回答3:

6.175