50 + 20 = β¦
70
56 + 20 = β¦
76
50 - 20 = β¦
30
56 - 20 = β¦
36
48 - β¦ = 50
-2
48 - β¦ = 56
-8
70 - 6 = β¦
64
40 + 5 = β¦
45
42 + 5 = β¦
47
48 + 7 = β¦
55
56 - 2 = β¦
54
56 - 8 = β¦
48
46 + 23 = β¦
69
46 + 28 = β¦
74
56 - 23 = β¦
33
56 - 28 = β¦
28
60 + 15 = β¦
75
37 + 8 = β¦
45
63 - 9 = β¦
54
81 - 17 = β¦
64
29 + 14 = β¦
43
58 + 12 = β¦
70
90 - 45 = β¦
45
77 - 33 = β¦
44
36 + 27 = β¦
63
54 + 19 = β¦
73
80 - 29 = β¦
51
67 - 18 = β¦
49
53 + 16 = β¦
69
72 + 8 = β¦
80
95 - 27 = β¦
68
84 - 39 = β¦
45
25 + 36 = β¦
61
44 + 28 = β¦
72
68 - 19 = β¦
49
73 - 24 = β¦
49
32 + 18 = β¦
50
41 + 29 = β¦
70
60 - 15 = β¦
45
85 - 37 = β¦
48
27 + 53 = β¦
80
38 + 42 = β¦
80