121 - 33 = 34 x 6 = 145 + 51 = 240 : 16 =
147 - 52 = 148 x 3 = 149 + 61 = 150 : 6 =
600 - 584 = 37 x 5 = 298 + 13 = 180 : 12 =
540 - 55 = 160 x 6 = 495 + 106 = 600 : 15 =
203 - 54 = 48 x 3 = 52 + 78 = 68 : 4 =
912 - 19 = 223 x 4 = 224 + 77 = 225 : 5 =
551 - 60 = 552 x 2 = 553 + 59 = 560 : 16 =