Question

Va rog ex c) si ex 46 dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

a=$7\frac{1}{2}$+$3\frac{2}{3}$=$\frac{15}{2} +\frac{11}{3}$

Aducem la acelasi numitor si devine $\frac{45}{6} +\frac{22}{6} =\frac{67}{6}$, deci a=$\frac{67}{6}$

$b=4\frac{1}{7} -3\frac{2}{3} =\frac{29}{7} -\frac{11}{3}$

Aducem la acelasi numitor si devine:

$\frac{87-77}{21} =\frac{10}{21}$

deci b=$\frac{10}{21}$

E=$\frac{1}{3} + \frac{67}{6} -2*(\frac{10}{21} )$

=$\frac{1}{3} +\frac{67}{6} -\frac{20}{21}$

=$\frac{14+469-40}{42}$

=$\frac{443}{42}$