Question

11) Efetue as adições:
a) (+3/5) + (+1/2) =
b) (-2/3) + (+5/4) =
c)(-4/9) + (+2/3) =
d) (-3/7) + (+2/9) =
e) (-1/8) + (-7/8)=
f) (-1/3) + (-1/5) =
g) (-1/8) + (5/4) =
h) (+1/5) + ( +3/5) =​

Answer 1

Resposta:

Explicação:

a)3/5 + 1/2 =

m.m.c(2,5) = 10

6/10 + 5/10 = 11/10

b)-2/3 + 5/4 =

m.m.c(3,4) = 12

-8/12 + 15/12 = 7/12

c)-4/9 + 2/3 =

m.m.c(9,3) = 9

-4/9 + 6/9 = 2/9

d)-3/7 + 2/9 =

m.m.c(7,9) = 63

-21/63 + 14/63 = -7/63  simplificando por 7 = - 1/9

e)-1/8 + (-7/8) =

-1/8  -  7/8  =  - 8/8 = - 1

f)-1/3 - 1/5 =

m.m.c (3,5) = 15

-5/15  -  3/15 = -8/15

g)-1/8 + 5/4 =

m.m.c(8,4) = 8

-1/8  + 10/8 = 9/8

h)1/5 + 3/5 = 4/5