Question

preciso dessas contas feitas agora por favor me ajudem
a-1/2+3/7+1/3
b-2/5+6/8
por favorrr

Answer 1

Resolução!

= 1/2 + 3/7 + 1/3 ____ MMC = 42

= 21 + 18 + 14/42

= 53/42

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= 2/5 + 6/8 ______ MMC = 40

= 16 + 30/40

= 46/40 ÷ 2

= 23/20

Espero ter ajudado

Answer 2

A)

$\dfrac{1}{2} + \dfrac{3}{7} + \dfrac{1}{3}$

Mmc de 2, 7 e 3=> 42

$\dfrac{21 + 18 + 14}{42}$

53/42

B)

$\dfrac{2}{5} + \dfrac{6}{8}$

Mmc de 5 e 8=> 40

$\dfrac{16 + 30}{40}$

$\dfrac{46}{40}$

$\dfrac{46 {}^{ \div 2} }{40 {}^{ \div 2} }$

23/20