a)
1 × 1 = 1
2 × 2 = 4
3 × 3 = 9
4 × 4 = 16
5 × 5 = 25
6 × 6 = 36
7 × 7 = 49
8 × 8 = 64
9 × 9 = 81
b)
nr sunt:
152, 251, 350.
c)
999 - 100 = 899
d)
(275 - 175) : (2 × 5) =
100 : 10 = 10
e)
(70 : 2) + (80 : 4) + (15 × 2) =
35 + 20 + 30 =
55 + 30 = 85
SPER CA TE-AM AJUTAT!