Question

3 și 4 ( ex) ! Este vorba de media mea vă rog frumos dau coroana însă nu mai am puncte

Answer 1

Răspuns:

3. a) $\frac{7}{4}$ * $\frac{3}{5}$= $\frac{21}{20}$   b) $\frac{3}{2} * \frac{5}{y7} = \frac{15}{14}$   c) $\frac{8}{3} * \frac{7}{5} =\frac{56}{15}$  

d) $-\frac{8}{9} *\frac{2}{y5} =-\frac{16}{45}$   e) - $\frac{9}{7} *\frac{6}{5} = - \frac{54}{35}$   f) $\frac{7}{8} *(- \frac{3}{5})=$$- \frac{21}{40}$

g) $-\frac{5}{9} * (-\frac{13}{8} )=$$\frac{65}{72}$   h) $\frac{4}{5} * \frac{11}{9} =\frac{44}{45}$     i) $\frac{7}{8} *\frac{3}{10} =\frac{21}{80}$

4.a) $\frac{2*12+1}{12} * \frac{4}{5}$ = $\frac{25}{12} * \frac{4}{5} =\frac{5}{3}$    b) $\frac{16}{9} : \frac{2*3+2}{3} =\frac{16}{9} * \frac{3}{8}$=$\frac{2}{3}$

c) $\frac{18}{35} * \frac{7}{5*7+1} = \frac{18}{36} =\frac{1}{2}$   d) (- $\frac{28}{15} )* \frac{5}{21}$= $-\frac{4}{9}$    e) $\frac{18*1+7}{18} * (- \frac{9}{10} )$= - $\frac{5}{4}$

f) - $\frac{15}{14} * \frac{7}{3*7+4}$= $-\frac{15}{2* 25}$= $-\frac{3}{10}$  g) $\frac{35}{16} * \frac{8}{8*3+1}$ = $\frac{5*7}{2*5*5}$=$\frac{7}{10}$

h) $\frac{35}{32} *\frac{8}{8*2+5}$= $\frac{5*7}{4*3*7}$$=\frac{5}{12}$    i) $\frac{28*1+17}{28} *\frac{42}{25}$ = $\frac{5*9* 6*7}{4*7* 5*5}$= $\frac{54}{20}$= $\frac{27}{10}$