Question

calcula adjunto foto el a,b,c,d​

Answer 1

m.c.m (8, 6, 4, 2) = 24

a) 9/8 + 7/6 + 5/4 - 3/2 = 27/24 + 28/24 + 30/24 - 36/24 =

= 55/24 + 30/24 - 36/24 = 85/24 - 36/24 = 49/24

m.c.m (5, 8) = 40

b) (7/5 - 3/8) : 5/4 =  (56/40 - 15/40) : 5/4= 41/40 : 5/4 = 164/200 =

= 82/100 = 41/50

c) -2 · 3/6 - 1/3 · 2/5 = -1/1 - 2/15 = -15/15 -2/15 = -17/15

m.c.m (4, 6) = 12

d) 2/3 + 1/4 : (1/4 - 5/6) = 2/3 + 1/4 : (3/12 - 10/12) = 2/3 + 1/4 : (-7/12) = 2/3 - 12/28 = 2/3 - 3/7 = 14/21 - 9/21 = 5/21