Question

13. Efectuați calculele:
16
4
20 8
10 25
a)
b)
c)
27
9
9 3
7 21
36
125
100
3
d)
:(
2.
-1
25
9
e) -3-
f) 24:
7
12
9
15
57
:(-19);
h) 24:42;
i)
8
i) 0:
3
10
3




Nu e neaparat toate macar a b c si d !!

Va rog e foarte urgent dau 10puncte și coroana!!!​

Answer 1

Răspuns:

a)

$\frac{20}{9} \div \frac{8}{3} = \\ \\ = \frac{20}{9} \times \frac{3}{8} = \\ \\ = \frac{5}{3} \times \frac{1}{2} = \\ \\ \frac{5}{6}$

b)

$- \frac{10}{7} \div \frac{25}{21} = \\ \\ = - \frac{10}{7} \times \frac{21}{25} = \\ \\ = - \frac{2}{1} \times \frac{3}{5} = \\ \\ = - \frac{6}{5}$

c)

$- \frac{16}{27} \div - \frac{4}{9} = \\ \\ = \frac{16}{27} \times \frac{9}{4} = \\ \\ = \frac{4}{3}$

d)

$\frac{125}{12} \div - \frac{100}{9} = \\ \\ = \frac{125}{12} \times - \frac{9}{100} = \\ \\ = \frac{5}{4} \times \frac{ - 3}{4} = \\ \\ = - \frac{15}{16}$

Succes! ♡︎♥︎♡︎