Question

Calcule e simplifique
a) 1/2 : 1/3
B)2/5 : 2/3
C) 7/8 : 1/4
D) 4/9 : 8/27
E)18/5 : 9/10
F)4/15 : 2/5
G) 1 : 11/4
H) 0 : 5/7

Answer 1

Sempre multiplica pela segunda equação invertida:
a) 1/2 ÷ 1/3 = 1/2 x 3/1 = 3/2

b) 2/5 ÷ 2/3 = 2/5 x 3/2 = 2.3/2.5 = 3/5

c) 7/8 ÷ 1/4 = 7/8 x 4/1 = 7.4/8.1 = 28/8 (÷4) = 7/2

d) 4/9 ÷ 8/27 = 4/9x27/8 = 4.27/9.8 = 108/72 (÷4) = 27/18 (÷3) = 9/6 (÷3) = 3/2

e) 18/5 ÷ 9/10 = 18/5 x 10/9 = 18.10/5.9 = 180/45 = 4

f) 4/15 ÷ 2/5 = 4/15 x 5/2 = 4.5/15.2 = 20/30 (÷10) = 2/3

g) 1 ÷ 11/4 = 1 x 4/11 = 1.4/11 = 4/11

h) 0 ÷ 5/7 = 0