Question

Calcule as frações com denominadores diferentes.

a)3/8 + 9/10

b)9/9 + 4/3

c)5/12 + 6/16

d)7/20 + 8/18​

Answer 1

Resposta:

a)3/8 + 9/10

$\frac{15+36}{40} \\\\\frac{51}{40}$

b)9/9 + 4/3

$\frac{9+12}{9}\\\\\frac{21}{9} :(3)\\\\=\frac{7}{3}$

c)5/12 + 6/16

$\frac{20+18}{48}\\\\\frac{38}{48} :(2)\\\\\frac{19}{24}$

d)7/20 + 8/18​

$\frac{63+80}{180}\\\\\frac{143}{180}$