Question

Números racionais com MMC obs: isso são frações

a)(+1/5) - (-1/3)
b)(-4/5) - (+3/10)
c)(-3/7) - (-2/14)
d)(+3/5) + (+2/10)
e)(+2/3) - (+1/2) por favor me ajudem!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

a) (+1/5) - (-1/3) = (1/5) + (1/3) = (mmc = 15) = (3 + 5)/15 = 8/15

b) (-4/5) - (3/10) = (mmc = 10) = (-8 - 3)/10 = -11/10

c) (-3/7) - (-2/14) = (-3/7) + (2/14) = (mmc = 14) = (-6 + 2)/14 = -4/14 = -2/7

d) (3/5) + (2/10) = (mmc = 10) = (6 + 2)/10 = 8/10 = 4/5

e) (2/3) - (1/2) = (mmc = 6) = (4 - 3)/6 = 1/6

Espero ter ajudado.