(1)500 + 790 =
(2)830 - 260 =
(3)720 + 700 =
(4)230 + 860 =
(5)770 - 570 =
(6)810 + 870 =
(7)500 + 970 =
(8)250 - 140 =
(9)240 + 430 =
(1)500 + 790 =
(2)830 - 260 =
(3)720 + 700 =
(4)230 + 860 =
(5)770 - 570 =
(6)810 + 870 =
(7)500 + 970 =
(8)250 - 140 =
(9)240 + 430 =