1. Efectuează:
53 + 8 =
5 + 77 =
27 + 13 =
35 + 28 =
FB 6, B4,52
46 + 38 =
66 + 34 =
14
28
13
[tex]16 + 47 = 63 19 + 21 = 1993768164[/tex]
71 plus 29 pătrat 68 Plus 32 ​