Question

a) 5/7 x 3/9 =
b) 6/5 + 3/4 =
c) 7/5 + 8/5=
d) 4/3/75 =
e) 1/2 - 1/3 =
f) 2/3 -3/4 - 5/2 =
Reescreva as frações e resolva:​

Answer 1

Resposta:

a)

$\frac{5}{7} \times \frac{3}{9} = \frac{15 \: \: (5).(7)}{63.(3).(9)} = \frac{5}{21} = 0.24$

b)

$\frac{6}{5} + \frac{3}{4} = \frac{6.4}{5.4} + \frac{3 .5}{4.5} = \: \frac{24 + 15}{20} = \frac{39}{20} = 1.95$

c)

$\frac{7}{5} + \frac{8}{5} = \frac{7 + 8}{5} = \frac{15}{5} = 3$

d)

$\frac{ \frac{4}{3} }{7} = \frac{ \frac{4.1}{3.7} }{7} = \frac{4}{21} = 0.19$

e)

$\frac{1}{2} - \frac{1}{3} \: = \frac{1.3}{2.3} - \frac{1.2}{3.2} = \frac{1}{6} = 0.166$