Scrie intregul ca o fractie, apoi calculeaza:
Repede Dau coroana + 30 p

Răspuns:
a) 3/3+2/3=5/3
b) 9/9+5/9=4/9
c) 7/7+3/7=10/7
d) ²⁾8/4+3/8=16/8+3/8=19/8
e) ³⁾4/10+¹⁰⁾9/3=12/30+90/30=(102/30)⁽²=51/15
f) ⁴⁾2/9+⁹⁾8/4=8/36+72/36=(80/36)⁽⁴=20/9