810-466=
445-277=
356+626=
865-578=
445+385=
1000-455=
345+513=
957-679=
531+975=
987-799=
342-274=
258+553=
391+504= 320×3= += -=
90-36= 812+0= 398×4≈ 0×53+47=
3.6×3.6 1.76÷0.171.76
-3.9-2.8 0.6×÷