Question

Calcule e simplifique as frações até chegar a uma fração irredutível:

a) 3/9+11/9+4/9=
b) 1 2/8+2/6=
c) 2 6/7-6/7=
d) 8/10-3/5+4/15=
e) 2/6×6/3×5/4=
f) 2 1/3×3/5=
g) 1 2/3×5/×1/5=
h) 4/5:2/3=
i) 4 1/2:3/=
j) 5/6:1 2/3=

Answer 1

a) 3/9 + 11/9 + 4/9 = 18/9= 2

B) 1 2/8 + 2/6 = 10/8 + 2/6 = 30/24 + 8/24= 38/24= 19/12

c) 2 6/7 -6/7= 20/7 -6/7= 14/7 = 2

d) 8/10-3/5+4/15= 8/10-6/10+ 4/15= 2/10+4/15= 6/30 + 8/30= 14/30 = 7/15

e) 2/6 × 6/3 × 5/4= 12/18 × 5/4 = 60/72 = 30/36 = 15/18= 5/6

f) 2 1/3 ×3/5= 7/3 × 3/5= 21/15 = 7/5

g) Falta um número

h) 4/5 ÷ 2/3 = 4/5× 3/2 = 12/10= 6/5

i) Falta um número

j) 5/6 ÷ 1 2/3 = 5/6 ÷ 5/3 = 5/6 × 3/5 = 15/30 = 1/2