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DAU CORONITA SI 30 DE PUNCTE
Calcucati:
3 supra 5 +4 supra 3
5 supra 7 +3 supra 5
11 supra 9 + 9 supra 11
13 supra 20 + 21 supra 12
2 supra 13 + 5 supra 26
9 supra 10 +11 supra 100


Răspuns :

(3/5)×3+(4+3)×5=19/15+20/15=29/15
(5+7)×5+(3+5)×7=
25/35+15/35=40/35
(11/9)×11+(9/11)×9=
121/99+81/99=202/99
(13/20)×6+(21/12)×10=
78/120+210/120=288/120
(2/13)×4+(5/26)×2=
8/52+10/52=18/52
(9/10)×100+(11/100)×10=
900/1000+110/1000=1100/1000