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3 intreg si 1 supra 4 + 2 supra 5

Răspuns :

3 1 / 4 + 2 / 5 =

3 × 4 + 1 / 4 + 2 / 5 =

12 + 1 / 4 + 2 / 5 =

13 / 4 + 2 / 5 =

65 / 20 + 8 / 20 = 73 / 20