Explicație pas cu pas:
a) 2:2+2x2-2
1+4-2
5-2
3
3+3x3+3:3-3
3+9+1-3
13-3
10
4x4-4:4+4
16-1+4
15+4
21
b) 5-5:5+5x5
5-1+25
4+25
29
6:6+6x6-6
1+36-6
37-6
31
7-7:7+7x7
7-1+49
6+49
55
c) 8-8:8+8x8
8-1+64
7+64
71
9:9+9x9-9
1+81-9
82-9
73
10-10:10+10x10
10-1+100
9+100
109
sper ca team ajutat