1) (812+88) + 54 = 900 + 54 = 9542) (526+74) + 81 = 600 + 81 = 6813) (56+45) + (25+24) = 101 + 49 = 1504) (72+23) + (67+18) = 95 + 85 = 180
1) (812+88) + 54 = 900 + 54 = 954
2) (526+74) + 81 = 600 + 81 = 681
3) (56+45) + (25+24) = 101 + 49 = 150
4) (72+23) + (67+18) = 95 + 85 = 180