Question

3/7+5/9-1/6的简便计算怎么做？

Answer 1

3/7+5/9-1/6

=27/63+35/63-1/6

=62/63-1/6

=372/378-63/378

=309/378

Answer 2

由题目可得式子3/7+5/9-1/6，在这个式子中首先计算后半部分，先将分母通分，6和9的最小公倍数是18，3/7+5/9-1＝3/7+10/18-3/18＝3/7+7/18＝54/126+49/126＝103/126

Answer 3

3/7+5/9-1/6 ①先找出7，9，6的最小公倍数126 ②通分 ③具体计算
3/7+5/9-1/6
=54/126+210/126-63/126
=(54+210-63)/126
=201/126
=1余75/126

Answer 4

3/7+5/9—1/6
=3/7+10/18—3/18
=3/7+7/18
=54/126+49/126
=103/126

Answer 5

这是分数加减题目
所谓简便计算方法就是通分
具体计算过程如下所示
3/7+5/9-1/6
=27/63+35/63-1/6
=62/63-1/6
=1-1/63-1/6
=1-(1/63+1/6)
=1-(6/378+63/378)
=1-69/378
=309/378