dau coroana clasa a2a
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Răspuns:
19=10+9
4=0+4
12=10+2
55=50+5
89=80+9
__________
10+6=16
20+1=21
4+80=84
50+0=50
30+7=37
Explicație pas cu pas:
4=0 si 4
72=7,0,2
55=5,0,5
89=8,9,0
4)
10 si 6=16
20 si 1=21
4 si 80=84
50 si 0=50
7 si 30=37