小学五年级数学简单计算(分数)

=3/10+11/21

=173/210

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

=3/2-1/3+1/6

=9/6-2/6+1/6

=8/6

=1和1/3

5/9-(2/9+1/6)

=5/9-2/9-1/6

=1/3-1/6

=1/6

5/7-(5/6-2/7)+5/6

=5/7+2/7-5/6+5/6

=1