2/25十(23/25一2/5)
=2/25十(23/25一2x5/25)
=2/25十(23/25一10/25)
=2/25十(23一10)/25
=2/25十13/25
=(2十13)/25
=15/25
=3/5
25/2十(25/23一5/2=(25/2十25/23)一5/2=1一5/2=5/3
25分之2+(25分之23-5分之2)
=(2/25+23/25)-2/5
=1-2/5
=3/5
=5分之3
2/25+(23/25-2/5)
=2/25+(23/25-10/25)
=2/25+13/25
=15/25
=3/5
2/25 + (23/25 - 2/5)
= 2/25 +23/25 - 2/5
= (2+23)/25 - 2/5
= 1 - 2/5
=3/5