Question

1/10+1/15+1/21+1/28+1/36等于多少？

Answer 1

答：1/10+1/15+1/21+1/28+1/36等于5/18

简便计算过程如下：

一、提取原式：1/10+1/15+1/21+1/28+1/36

二、计算过程：

      =2×( 1/20+1/30+1/42+1/56+1/72 )

      =2×（ 1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9 )

      =2×（ 1/4-1/9 )

      =2×5/36

      =5/18

三、计算结果：5/18

Answer 2

1/10+1/15+1/21+1/28+1/36＝（3/30+2/30）+1/21+1/28+1/36＝1/6+1/21+1/28+1/36＝（6/36+1/36）+1/21+1/28＝7/36+1/21+1/28＝（49/252+9/252）+1/21＝29/126+1/121＝3509/25246+126/25246＝3635/25246

Answer 3

1/10+1/15+1/21+1/28+1/36
= 2 (1/20+1/30+1/42+1/56+1/72)
= 2 ( 1/4-1/5 +1/5-1/6 +1/6-1/7 +1/7-1/8 +1/8-1/9 )
= 2 (1/4-1/9)
= 1/2-2/9
= 9/18-4/18
= 5/18

Answer 4

合并分母，分子相加。
自己计算下，不要什么都等着答案。

Answer 5

1/10+1/15+1/21+1/28+1/36
=5/30+7/84+1/36
=1/6+1/12+1/36
=10/36
=5/18.