Počítání do sta

Počítej zpaměti.
71 – 43 =
54 + 37 =
64 – 28 =
64 + 29 =
55 + 28 =
43 – 28 =
47 + 39 =
85 – 26 =
74 – 37 =
92 – 57 =
25 + 38 =
53 – 25 =
43 + 38 =
66 + 27 =
87 – 59 =
24 + 39 =
77 – 59 =
54 – 28 =
93 – 39 =
55 + 38 =