Question

Tot exercitiul va rog frumos ❤​

Answer 1

15)

a)

$\dfrac{ \dfrac{1}{5} }{\dfrac{1}{10} } = \dfrac{1}{5} \div \dfrac{1}{10} = \dfrac{1}{5} \times \dfrac{10}{5} = \dfrac{2}{1} = 2$

b)

$\dfrac{ \dfrac{1}{3} }{ - \dfrac{1}{6} } = \dfrac{1}{3} \div ( - \dfrac{1}{6} ) = \dfrac{1}{3} \times ( - \dfrac{6}{1} ) = - \dfrac{2}{1}=-2$

c)

$\dfrac{ \dfrac{1}{2} }{ - \dfrac{1}{3} } = \dfrac{1}{2} \div ( - \dfrac{1}{3} ) = \dfrac{1}{2} \times ( - \dfrac{3}{1} ) = - \dfrac{3}{2}$

d)

$\dfrac{ - \dfrac{ 5}{2} }{ - \dfrac{15}{4} } = (- \dfrac{5}{2} ) \div ( - \dfrac{15}{4}) = ( - \dfrac{5}{2}) \times (- \dfrac{4}{15}) = \dfrac{2}{3}$

e)

$\dfrac{ - 3.6}{ - 1.5} =( - \dfrac{36}{10} )\div (- \dfrac{15}{10} ) =( - \dfrac{36}{10} ) \times ( - \dfrac{10}{15} ) = \dfrac{12}{5}$

f)

$\dfrac{ - \dfrac{ 3}{8} }{0.1} = ( - \dfrac{3}{8}) \div \dfrac{1}{10} = ( - \dfrac{3}{8} ) \times \dfrac{10}{1} = - \dfrac{15}{4}$

g)

$\dfrac{ 1\dfrac{3}{2} }{1 \dfrac{1}{4} } = \dfrac{5}{2} \div \dfrac{5}{4} = \dfrac{5}{2} \times \dfrac{4}{5} = \dfrac{2}{1} = 2$

h)

$\dfrac{ - 2.4}{ \dfrac{3}{5} } =( - \dfrac{24}{10} ) \div \dfrac{3}{5} = ( - \dfrac{24}{10} ) \times \dfrac{5}{3} = - \dfrac{8}{2} = -4$