11 + 80 =; 56 − 0 =; 6 + 92 =; 48 − 23 =; 17 + 55 =; 80 − 0 =; 3 + 41 =; 86 − 82 =; 40 + 33 =; 66 − 63 =; 55 + 5 =; 20 − 4 =; 35 + 42 =; 61 − 23 =; 76 + 11 =; 41 − 31 =; 34 + 31 =

11 + 80 = 91; 56 − 0 = 56; 6 + 92 = 98; 48 − 23 = 25; 17 + 55 = 72; 80 − 0 = 80; 3 + 41 = 44; 86 − 82 = 4; 40 + 33 = 73; 66 − 63 = 3; 55 + 5 = 60; 20 − 4 = 16; 35 + 42 = 77; 61 − 23 = 38; 76 + 11 = 87; 41 − 31 = 10; 34 + 31 = 65.