小学五年级下册数学分数计算题大全有答案

  2/3-7/8 1/3
=(2/3 1/3)-7/8
=1-7/8
=1/8
?
5/6-(3/7-1/6)
=(5/6 1/6)-3/7
=1-3/7
=4/7
?
1-1/3-2/3
=1-(1/3 2/3)
=1-1
=0
?
1 3/5-1/10
=1 6/10-1/10
=1 1/2
=1又1/2
?
3/8-12/13 5/8
=3/8 5/8-12/13
=1-12/13
=1/13
?
1-(1/2-3/4)
=1 3/4-2/4
=1 1/4
=5/4
?
1-1/2-1/4
=1/2-1/4
=2/4-1/4
=1/4
?
2/7-8/9 5/7
=(2/7 5/7)-8/9
=1-8/9
=1/9
?
2-1/4-3/4
=2-(1/4 3/4)
=2-1
=1
?
1/2-(3/8-1/2)
=1/2 1/2-3/4
=1-3/8
=5/8。