Question

Subtraçao e adiçao de numeros racionais
Calcule :
a) 7/2 + 10/7
b)4 5/9 -3/9
c)5 1/2
d)5/3 -3/4
e 5+ 3/3+ 8/10

Answer 1

Explicação passo-a-passo:

$a) \frac{7}{2} + \frac{10}{7} = \frac{49 + 20}{14} = \frac{69}{14 } \\ \\ b) \frac{45}{9} - \frac{3}{9} = \frac{5}{1 } - \frac{3}{9} = \\ \\ \frac{45 - 3 }{9} = \frac{42 :3 }{9 :3 } = \frac{14}{3} \\ \\ c) \frac{51}{2} = 25.5 \\ \\ d) \frac{5}{3} - \frac{3}{4} = \frac{20 - 9}{12} = \frac{11}{12} \\ \\ e) \frac{5 + 3}{3} + \frac{8}{10} = \frac{8}{3} + \frac{8}{10} = \\ \\ \: \: \: \: \frac{80 + 24}{30} = \frac{104 :2 }{30 : 2} = \frac{52}{15}$

espero ter ajudado....♡