1⼀2X3=1⼀2-1⼀3 1⼀3X4=1⼀3-1⼀4请根据以上规律计算:1⼀2X3+1⼀3X4+1⼀4X5+.....+1⼀98X99+1⼀99X100=

2024-12-23 04:30:34
推荐回答(2个)
回答1:

1/2X3+1/3X4+1/4X5+.....+1/98X99+1/99X100
=1/2-1/3+1/3-1/4+1/4-1/5+。。。+1/98-1/99+1/99-1/100
=1/2-1/100
=49/100

回答2:

13x4/7x14
=5/13x8
=40/13