9× 6/5×(4+1/3)×1/24计算，谢谢。

6/5×(4+1/3)×1/24计算，谢谢。  

6/5×(4+1/3)×1/24计算，谢谢。

6/5×(4+1/3)×1/24
=6/5x1/24x13/3
=1/20x13/3
=13/60

计算：1/60÷（1/3—1/4+1/5—1/6）

1/60÷（1/3—1/4+1/5—1/6）
=1/60÷（20/60-15/60+12/60-10/60）
=1/60÷（7/60）
=1/60×（60/7）
=1/7

计算1/2*1/3+1/3*1/4+1/4*1/5+1/5*1/6+.......+1/10*1/11

1/2*1/3+1/3*1/4+1/4*1/5+1/5*1/6+.......+1/10*1/11
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+......+1/10-1/11
=1/2-1/11
=9/22

1/1×2+1/2×3+1/3×4+1/4×5+…+1/39×40怎么计算如题 谢谢了

1/1×2+1/2×3+1/3×4+1/4×5+…+1/39×40 =1-1/2+1/2-1/3+1/3-1/4+.......+1/39-1/40 =1-1/40 =39/40

计算：1-2/5+3/5=？ 8.1+1/4=？ （1/4+1/3）×24=？ 24÷3/4=？ 0.2-1/5=？ 1÷3/2×2/3

1-2/5+3/5=5/5-2/5+3/5=（5-2+3）/5=6/5=1 1/5
8.1+1/4=8.1+0.25=8.35
（1/4+1/3）×24=1/4*24+1/3*24=6+8=14
24÷3/4=24除以3乘以4=8*4=32
0.2-1/5=0.2-0.2=0
1÷3/2×2/3=4/9（=1*2/3*2/3=4/9）

计算:(2×3×4×5)×(1/2-1/3-1/4+1/5)

(2×3×4×5)×(1/2-1/3-1/4+1/5)
=2×3×4×5×(3×4×5-2×4×5-2×3×5+2×3×4)/(2×3×4×5)
=60-40-30+24
=14

计算（2*3*4*5）*（1/2+1/3+1/4+1/5）

（2*3*4*5）*（1/2+1/3+1/4+1/5）=（2×3×4×5×1/2）+（2×3×4×5×1/3）+（2×3×4×5×1/4）+（2×3×4×5×1/5） =60+40+30+24 =154

1/3*4+1/4*5+1/5*6+······+1/19*20简便方法计算

1/3*4+1/4*5+1/5*6+······+1/19*20
=1/3-1/4+1/4-1/5+1/5-1/6+...+1/19-1/20
=1/3-1/20
=17/60

39×9/14÷13/14÷18=？ 9/20×1/2+19/20÷2=？ （1/4+1/3÷1/2）÷1/5=？ 请脱式计算 谢谢

39×9/14÷13/14÷18
=39÷18x9/14x14/13
= 2x9/13
=18/13
9/20×1/2+19/20÷2
=9/20×1/2+19/20x1/2
=（9/20+19/20）x1/2
=28/20x1/2
=7/10
（1/4+1/3÷1/2）÷1/5
=（1/4+2/3）÷1/5
= 1/4x5+2/3x5
=5/4+10/3
=55/12

计算1/2×1/3+1/3×1/4+1/4×1/5+……+1/2001×1/2002

1/2×1/3+1/3×1/4+1/4×1/5+……+1/2001×1/2002
=（1/2-1/3）+（1/3-1/4）+（1/4-1/5）+……+（1/2001-1/2002）
=1/2-1/2002
=1001/2002-1/2002
=1000/2002
=500/1001