Question

10. Calcule:
a) ( - 3,75) . ( - 4,8) = *

b) 2/3 . (- 1/6) . 9/5 =
c) (+ 13/4) : ( - 5/8) = *
ME AJUDAAAAAAAAAA

Answer 1

Resposta:

A)

$( - 3.75) \times ( - 4.8) \\ 3.75 \times 4.8 = 18$

B)

$\frac{2}{3} \times ( - \frac{1}{6}) \times \frac{9}{5} \\ - \frac{2}{3} \times \frac{1}{6} \times \frac{9}{5} \\ - 2 \times \frac{1}{6} \times \frac{3}{5} \\ - \frac{1}{3} \times \frac{3}{5} = \frac{1}{5}$

C)

$( + \frac{13}{4}) \div ( - \frac{5}{8}) \\ - \frac{13}{4} \div \frac{5}{8} = - \frac{13}{4} \times \frac{8}{5} \\ - 13 \times \frac{2}{5} = - \frac{26}{5}$