Question

简便运算：5/6-(3/4-1/2) 2/5+2/3-2/5 2/15+(1/2+8/15) 11/18-7/12+7/

Answer 1

5/6-(3/4-1/2)

=5/6-1/4

=7/12.

2/5+2/3-2/5

=2/3.

2/15+(1/2+8/15)

=2/15+8/15+1/2

=2/3+1/2

=5/6.

11/18-7/12+7/18+7/12

=1.

4/9+5/11+(6/11+5/9)

=4/9+5/9+5/11+6/11

=2.

1/6+9/13+5/6-9/13=1.进童话书比漫画书多,选1.