Question

AJUTOR PUTETI SA RASPUNDETI DAU 30 DE PUNCTE!!

Answer 1

$a) \\ \\ ( \frac{1}{4} + \frac{5}{4} + \frac{6}{4} + \frac{23}{4}) - ( \frac{17}{4} + \frac{17}{4} - \frac{20}{4} + \frac{11}{4}) = \frac{1}{4} + \frac{5}{4} + \frac{3}{2} + \frac{23}{4} - ( \frac{17}{4} + \frac{17}{4} - 5 + \frac{11}{4}) = \frac{1}{4} + \frac{5}{4} + \frac{3}{2} + \frac{23}{4} - \frac{25}{4} = \frac{10}{4} = \frac{5}{2} \\ \\ b) \\ \\ a + \frac{6}{9} = \frac{20}{9} \\ \\ a + \frac{2}{3} = \frac{20}{9} \\ \\ a = \frac{20}{9} - \frac{2}{3} = \frac{14}{9} \\ \\ b - \frac{26}{3} = \frac{14}{3} \\ \\ b = \frac{14}{3} + \frac{26}{3} = \frac{40}{3} \\ \\ \frac{80}{10} - c = \frac{26}{10} \\ \\ 8 - c = \frac{26}{10} \\ \\ 8 - c = \frac{13}{5} \\ \\ - c = \frac{13}{5} - 8 = - \frac{27}{5} \\ \\ c = \frac{27}{5} \\ \\ \frac{30}{5} + d = \frac{98}{5} \\ \\ 6 + d = \frac{98}{5} \\ \\ d = \frac{98}{5} - 6 = \frac{68}{5}$

c)

50%•10000=0,5•10000=5000

75%•4500=0,75•4500=3375

Answer 2

a)
$( \frac{1}{4} + \frac{5}{4} + \frac{6}{4} + \frac{23}{4} ) - ( \frac{17}{4} + \frac{17}{4} - \frac{20}{4} + \frac{11}{4}$
$\frac{35}{4} - \frac{25}{4}$
$\frac{10}{4}$

b)
$a + \frac{6}{9 } = \frac{20}{9}$
$a = \frac{20}{9} - \frac{6}{9}$
$a = \frac{14}{9}$
verificare:
$\frac{14}{9} + \frac{6}{9} = \frac{20}{9}$


$b - \frac{26}{3} = \frac{14}{3}$
$b = \frac{14}{3} + \frac{26}{3}$
$b = \frac{40}{3}$
verificare:
$\frac{40}{3} - \frac{26}{3} = \frac{14}{3}$


$\frac{80}{10} - c = \frac{26}{10}$
$c = \frac{80}{10} - \frac{26}{10}$
$c = \frac{54}{10}$
verificare:
$\frac{80}{10} - \frac{54}{10} = \frac{26}{10}$



$\frac{30}{5} + d = \frac{98}{5}$
$d = \frac{98}{5} - \frac{30}{5}$
$d = \frac{68}{5}$
verificare:
$\frac{30}{5} + \frac{68}{5} = \frac{98}{5}$

c) 50 000 din 10% =
$\frac{50000}{100} \times 10 = \frac{500000}{100} = 5000$
75% din 4500=
$\frac{4500}{100} \times 75 = \frac{337500}{100} = 3375$