Question

Calculați va rog!! Dau 20 de puncte ​

Answer 1

Răspuns:

a) partea de sus :

($4\frac{3}{5} - 2\frac{1}{5}$ )*$\frac{5}{6} +3$= $(\frac{4*5+3}{5} - \frac{2*5+1}{5} )$ * $\frac{5}{6} +3$ = $(\frac{23}{5} - \frac{11}{5} )$* $\frac{5}{6} +3$=

$\frac{12}{5} *\frac{5}{6} +3$= $\frac{12*5}{5*6} + 3= \frac{60}{30} +3$= 2 + 3= 5

partea de jos : $\frac{18}{15} :\frac{6}{5} = \frac{3*6}{3*5} * \frac{5}{6}$= $\frac{3}{3} = 1$

$\frac{5}{1} = 5$

b) $\frac{4*4}{5*5} *\frac{4*5}{2*4} - \frac{9}{5} :\frac{3*10+6}{10} + \frac{1}{10}$= $\frac{4*4}{5*2}$ - $\frac{9}{5} *\frac{10}{36}$ + $\frac{1}{10}$= $\frac{16}{10} - \frac{2}{4} + \frac{1}{10}$=$\frac{17}{10} - \frac{1}{2}$= $\frac{17-5}{10} = \frac{12}{10} = \frac{6}{5}$

c) $\frac{5}{8} *248$= $\frac{5*248}{8} = \frac{5*8*31}{8} =5*31=$155

d) $\frac{34}{100} *150$= $\frac{34*150}{100} = \frac{34* 50*3}{2*50}$= $\frac{2*17*3}{2} =$17*3= 51