Question

3. Resolva as operações com frações:
a) 2/5 + 3/5 = 1
b) 4/4 + 3/5 = 1.6
c) ¾ + ½ + 3/12 =

d) 5/6 + 4/8 + 6/9 =
e) 2/11+ 3/13 =
f) 5 + ¾ =
g) 6/2 + ¾ =
h) 5/9 + 5/12 =
i) 3/6 + 7/8 =
j) 7/8 + 9/6 + 4/3 =
k) 3/4 + 4/5 =
l) 3/7 + 1/3 =
​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 2/5 + 3/5 = (2+3)/5 = 5/5 = 1

b) 4/4 + 3/5 = (20+12)/20 = 32/20 = 16/10 ou   1,6

c) ¾ + ½ + 3/12 = (9+6+3)/12 = 18/12 = 3/2 ou 1,5

d) 5/6 + 4/8 + 6/9 = (60+36+48)/72 = 144/72 = 2

e) 2/11+ 3/13 = (26+33)/143 = 59/143

f) 5 + ¾ = (20+3)/4 = 23/4 ou 5,75

g) 6/2 + ¾ = (12+3)/4 = 15/4 ou 3,75

h) 5/9 + 5/12 = (20+15)/36 = 35/36

i) 3/6 + 7/8 = (12+21)/24 = 33/24 = 11/8 ou 1,375

j) 7/8 + 9/6 + 4/3 = (21+36+32)/24 = 89/24 ou 3,708333...

k) 3/4 + 4/5 = (15+16)/20 = 31/20 ou 1,55  

l) 3/7 + 1/3 = (9+7)/21 = 16/21