34+27=
80-46=
71-19=
570+60=
510-320=
800-190=
237+73=
100-37=
522+288=
508-397≈
295+311≈
701-98≈
2002 2200 2020 2220 2022 222
<<<<<
5007 5700 5070 5079 570 750
>>>>>