1/15+2/15*-20/7/16/21
Mathématiques
nandinisankar25
Question
1/15+2/15*-20/7/16/21
1 Réponse
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1. Réponse matmgn
Bonjour
1/15+2/15×(-(20/7)/(16/21))= 1/15+2/15×(-(20/7)×(21/16))= 1/15+2/15×(-(20×21)/(7×16))= 1/15+2/15×(-(4×5×3×7)/(7×4×4))= 1/15+2/15×(-(5×3)/4)= 1/15+2/15×(-15/4)= 1/15+(-(2×15)/(15×4)= 1/15-2/4= 1/15-1/2=2/30-15/30=-13/30