Question

a) 3/5 : 1/10 =

b)2/3•5/2•7/4=

c)4/5-1/2+3/4=

d)2/7+13/7-1/7=

alguém me ajuda pfvv
​

Answer 1

Resolução!

A = 3/5 : 1/10

A = 3/5 × 10/1

A = 30/5

A = 6

B = 2/3 . 5/2 . 7/4

B = 70/24 ÷ 2

B = 25/12

C = 4/5 - 1/2 + 3/4 _____ MMC = 20

C = 16 - 10 + 15/20

C = 6 + 15/20

C = 21/20

D = 2/7 + 13/7 - 1/7

D = 2 + 13 - 1 /7

D = 15 - 1/7

D = 14/7

D = 2

Espero ter ajudado

Answer 2

Explicação passo-a-passo:

A)

$\dfrac{3}{5} \div \dfrac{1}{10}$

$\dfrac{3}{5} \times \dfrac{10}{1}$

$\dfrac{30}{5}$

6

B)

$\dfrac{2}{3} \times \dfrac{5}{2} \times \dfrac{7}{4}$

$\dfrac{70 {}^{ \div 2} }{24 {}^{ \div 2} }$

$\dfrac{35}{12}$

C)

$\dfrac{4}{5} - \dfrac{1}{2} + \dfrac{3}{4}$

$\dfrac{16 - 10 + 15}{20}$

$\dfrac{21}{20}$

D)

$\dfrac{2}{7} + \dfrac{13}{7} - \dfrac{1}{7}$

$\dfrac{2 + 13 - 1}{7}$

$\dfrac{14}{7}$

$2$