Răspuns:
a)
1) (2/3) la patrat= 4/9
2) 2=18/9÷4/9=18/9×9/4=162/36=81/18=27/6
3) 11/5×10/11= 110/55=22/11
4) 27/6+22/11= 297/66+132/66=429/66
5)143/22
