Question

Vă rog ajutați mă la ex 1 și 2 dcb
dau coroana!

Answer 1

Exercitiul 1 :
a)$\frac{4}{2}= \frac{6}{3} =\ \textgreater \ 4*3 =6*2 ---\ \textgreater \ 12=12 (Adevarat)$ aceasta egalitate de fractii  e adevarata.
b)$\frac{5}{7}= \frac{15}{21}=\ \textgreater \ 5*21=7*15 --\ \textgreater \ 105=105 (Adevarat)$  aceasta egalitate de fractie e adevarata.
c)$\frac{1}{12}= \frac{5}{30} =\ \textgreater \ 1*30=12*5 ---\ \textgreater \ 30=30 (Adevarat)$   aceasta  e si ea adevarata.
d)$\frac{3}{17} = \frac{6}{34}=\ \textgreater \ 3*34=17*6--\ \textgreater \ 102=102 (Adevarat)$  e adevarata.
e)$\frac{11}{4}= \frac{33}{22}=\ \textgreater \ 11*22=4*34 --\ \textgreater \ 242=136(Falsa)$  aceasta e falsa.
2)[tex] \frac{12}{28} = \frac{3}{7} =\ \textgreater \ 3*28=7*12-\ \textgreater \ 84=84(A) [/tex]
[tex] \frac{12}{28}= \frac{12}{28} si \frac{12}{28}= \frac{9}{21} =\ \textgreater \ 12*21=28*9--\ \textgreater \ 252=252(Adevarat) [/tex]
b)$\frac{125}{15}= \frac{125}{15} si \frac{125}{15} = \frac{25}{3}$
c)$\frac{8}{8} = \frac{7}{7} si /cu \frac{5}{5} sau \frac{3}{3}$
d)[tex] \frac{1}{3} = \frac{2}{6} sau \frac{1}{3}= \frac{3}{9} sau \frac{1}{3}= \frac{4}{12} [/tex]