Question

Calculati:
va rog...dau coroana

Answer 1

3.
a)
$\frac{3}{5} - \frac{1}{5} = \frac{2}{5}$
b)
$\frac{15}{2} - \frac{9}{2} = \frac{6}{2} = 3$
c)
$\frac{4}{3} - \frac{5}{7} \\ \frac{28}{21} - \frac{15}{21} = \frac{13}{21}$
d)
$= \frac{15}{7} - \frac{11}{?5} = - \frac{2}{35}$
e)
$6 \div \frac{10}{5} = 6 \times \frac{5}{10} = 3 \times 1 = 3$
f)
$2 \div \frac{4}{9} = 2 \times \frac{9}{4} = \frac{9}{2}$
g)
$\frac{22}{3} \times \frac{5}{2} = \frac{55}{3}$
h)
$1 \times \frac{8}{5} = \frac{8}{5}$
4.
a. 2/3 din 15=
$\frac{2}{3} \times 15 = 10$
b. 1/5 din 20
$\frac{1}{5} \times 20 = 4$
c. 2/7 din 35
$\frac{2}{7} \times 35 = 10$
d. 2/5 din 100
$\frac{2}{5} \times 100 = 40$

Answer 2

$a). \frac{3}{5} - \frac{1}{5} = \frac{2}{5} \\ b). \frac{15}{2} - \frac{9}{2 } = \frac{6}{2} = 3$
$e) \: 6 \div \frac{10}{5} = 6 \times \frac{5}{10} = \frac{30}{10} = 3$
$f).2 \div \frac{4}{9} = 2 \times \frac{9}{4} = \frac{18}{4} = \frac{9}{2}$
$g).(7 + \frac{1}{3} ) \times \frac{5}{2} = \frac{22}{3} \times \frac{5}{2} = \frac{110}{6}$
$h).( \frac{1}{4} + \frac{3}{4}) \times \frac{8}{5} = \frac{4}{4} \times \frac{8}{5} = \frac{32}{20} = \frac{8}{5}$
$4).a. \: \frac{2}{3} din \: 15 = \frac{2}{3} \times 15 = \frac{30}{3} = 10$
$b. \frac{1}{5} din \: \: 20 = \frac{1}{5} \times 20 = \frac{20}{5} = 4$
$c). \frac{2}{7} din \: 35 = \frac{2}{7} \times 35 = \frac{70}{7} = 10$
$d) \frac{2}{5} din \: 100 = \frac{2}{5} \times 100 = \frac{200}{5 } = 40$
sper ca te-am ajutat!