Выполни вычисления.
90 − 20
70 + 16
64 + 30
73 + 10
65 − 60
3 + 64
82 + 7
46 + 20
54 − 4
29 + 60
80 + 11
7 + 82
90 − 20 = 70;
70 + 16 = 70 + 10 + 6 = 80 + 6 = 86;
64 + 30 = 60 + 4 + 30 = 90 + 4 = 94;
73 + 10 = 70 + 3 + 10 = 80 + 3 = 83;
65 − 60 = 60 + 5 − 60 = 5
3 + 64 = 3 + 60 + 4 = 60 + 7 = 67;
82 + 7 = 80 + 2 + 7 = 80 + 9 = 89;
46 + 20 = 40 + 6 + 20 = 60 + 6 = 66;
54 − 4 = 50 + 4 − 4 = 50;
29 + 60 = 20 + 9 + 60 = 80 + 9 = 89;
80 + 11 = 80 + 10 + 1 = 90 + 1 = 91;
7 + 82 = 7 + 80 + 2 = 80 + 9 = 89.