clasa 1 vreau rezolvare completă te roggg
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Răspuns:
30+20=50
4+3=5
50+5=55
50+1+20+6
50+20=70
1+6=7
70+7=77
50+2+30+6
50+2=52
2+6=8
52+8=60
60+3+30+6
60+30=90
3+6=9
90+9=99