Question

efetue
$\frac{1}{2} + 3 + \frac{4}{5}$

$\frac{17}{5} - \frac{7}{4} + \frac{3}{10}$

$\frac{3}{8} \times \frac{16}{27} \times \frac{9}{10}$

$\frac{13}{8} \div \frac{26}{9}$
$( \frac{3}{2} + \frac{1}{4} \frac{3}{8} ) \div \frac{11}{2}$

Answer 1

a) 1⁄2 + 3 + 4⁄5
5⁄10 + 30⁄10 + 8⁄10 = 43⁄10 = 4,3

b) 17⁄5 - 7⁄4 + 3⁄10
68⁄20 - 35⁄20 + 6⁄10 = 28⁄20 = 14⁄10 = 7⁄5 = 1,4

c) 3⁄8 × 16⁄27 × 9⁄10 = 432⁄2160 = 1⁄5

d) 13⁄8 × 9⁄26 = 117⁄208

e) (3⁄2 + 13⁄48) × 2⁄11
(72⁄48 + 13⁄48) × 2⁄11
85⁄48 × 2⁄11 = 170⁄528 = 85⁄264

Espero ter ajudado :)