Question

Va rog sa ma ajutați
5 stele+inimioara ​

Answer 1

Răspuns:

49. a) x= $\frac{4}{6} - \frac{1}{2}$= $\frac{4-3}{6}$ = $\frac{1}{6}$

b) x= $\frac{8}{10} - \frac{8}{5}$= $\frac{8}{10} - \frac{16}{10}$= $\frac{8}{10}$= $\frac{4}{5}$

c) x= $\frac{4}{8} * \frac{2}{1}$= 8/8= 1

d)  3x=$\frac{1}{2}$ => x= $\frac{1}{2}:3$= $\frac{1}{6}$

e) x= $\frac{8}{9} +\frac{5}{6}$= $\frac{2*8+ 3*5}{18}$= $\frac{16+15}{18}$= $\frac{31}{18}$

50.  20= 2²*5¹    90=3²*2¹*5¹

45= 3²*5¹        125=5³

21= 3¹*7¹    75= 3¹*5²

210= 2¹*3¹*5¹*7¹