Question

1-1/5-3/10等于几分之几？

Answer 1

答案如下：1-1/5-3/10
解原式=4/5-3/10
=8/10-3/10
=5/10
=1/2

Answer 2

1-1/5-3/10
=10/10-2/10-3/10
=5/10
=1/2