Question

Calcule e simplifique o resultado quando dor possivel.
(A) 5/38 + 25/38
(B) 2/5 + 7/20
(C) 2 inteiros e 1/8 - 3/5
(D) 3 inteiros e 1/6 - 2 inteiros e 8/9
(E) 3 inteiros - 1/2 + 5/4

Por favor me ajudem

Answer 1

a) $\frac{5}{38} + \frac{25}{38} = \frac{30}{38} = \frac{15}{19}$

b) $\frac{2}{5} + \frac{7}{20} = \frac{8}{20} + \frac{7}{20}= \frac{15}{20} = \frac{3}{4}$

c) $2 \frac{1}{8} - \frac{3}{5} = \frac{17}{8} - \frac{3}{5} = \frac{85}{40} - \frac{24}{40} = \frac{61}{40}$

d) $3 \frac{1}{6} - 2\frac{8}{9}= \frac{19}{6} - \frac{26}{9} = \frac{57}{18} - \frac{52}{18} = \frac{5}{18}$

e) $3- \frac{1}{2} + \frac{5}{4} = \frac{3}{1} - \frac{1}{2} + \frac{5}{4} = \frac{12}{4} - \frac{2}{4} + \frac{5}{4} = \frac{15}{4}$