Calculati:
va rog...dau coroana

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

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