comment calculer A=5/4+11/4×20/33 sous forme d'une fraction irréductible

5/4 + 11*(5/3) =

(on simplifie 20 et 4 par 4 et 11 et 33 = 1/3)

5/4+1*5/3 =

5/4 + 5/3 =

15/12 + 20/12 =

35/12

235/12

5/4 + 11/4 x 20/33
= 5/4 + (11 x 20)/(4 x 33)
= 5/4 + 220/132
= (5 x 33)/(4 x 33) + 220/132
= 165/132 + 220/132
= 385/132
= (11 x 35)/(11 x 12)
= 35/12