①56+15-24=
②98-50-12=
③86-(13+42)=
④45+28+23=
51-24+18= 100-38-56= 24-17+79=
63+27=
80﹣17=
45﹣28=
85﹣17+25=
53﹣(24+18)=
67﹣28+11=
①65+27=
②90-47=
③75-46+31=
④78-(26+35)=
①67+28-25 ②67-25+28 ③67-(28-25) ④67+(28-25)
请写出移动后仍成立的两个等式: