Sagot :
Réponse :
A = 3/2) x (11/4 - 12/5)
= 3/2) x (55/20 - 48/20)
= 3/2) x (7/20
A = 21/40
B = - 10/3) + 5/108 ÷ 35/72 ordre de priorité ÷
= - 10/3 + 5 x 72/108 x 35
= - 10/3 + 2/21
= - 70/21 + 2/21
B = - 68/21
C = ((5/2) + 6)/((3/2) + 1)
= (5/2 + 12/2)/(3/2 + 2/2)
= 17/2/5/2
C = 17/5
Explications étape par étape :
3/2×(11/4-12/5)
=3/2×(55-48)/20
=3/2×7/20
=(3×7)/(2×20)
=21/40
B=-10/3+5/108÷35/72
=-10/3+5/108×72/35
=-10/3+360/3780
=-10/3+(360÷180)/(3780÷180)
=-10/3+2/21
=(-70+2)/21
=-68/21
C=((5/2+6))÷((3/2+1)
=((5+12)/2))÷((3+2)/2)
=17/2÷5/2
=17/2×2/5
=(17×2)/(2×5)
=34/10
=(34÷2)/(10÷2)
=17/5