88 + 77 = 100 + =

236 + 56 = 280 + =

350 - 161 = (350 - 150 ) - =

721 - 485 = (721 - 500) + =

706 - 607 =

1350 - 495 = 1355 - =

63 x 8 = ( + 3) x 8 =

76 x 5 = 350 + =