Proszę o jak najszybszą odpowiedź

[tex]a)\ \ -2\frac{1}{4}\cdot2\frac{1}{3}=-\frac{\not9^3}{4}\cdot\frac{7}{\not3_{1}}=-\frac{3}{4}\cdot7=-\frac{21}{4}=-5\frac{1}{4}\\\\\\b)\ \ (-7\frac{1}{5}):(-3\frac{1}{5})=7\frac{1}{5}:3\frac{1}{5}=\frac{36}{5}:\frac{16}{5}=\frac{\not36^9}{\not5_{1}}\cdot\frac{\not5^1}{\not16_{4}}=9\cdot\frac{1}{4}=\frac{9}{4}=2\frac{1}{4}[/tex]

[tex]c)\ \ (-1,4)\cdot(-5,07)=1,4\cdot5,07=\frac{14}{10}\cdot\frac{507}{100}=\frac{7}{5}\cdot\frac{507}{100}=\frac{3549}{500}=7\frac{49}{500}\\\\\\d)\ \ 0,056:(-0,7)=-0,056:0,7=-56:700=-\frac{56}{700}=-\frac{2}{25}\\\\0,056:(-0,7)=-(0,056:0,7)=-0,08[/tex]

Basetlaviz Basetlaviz · Answer 2

[tex]a) \ -2\frac{1}{4}\cdot2\frac{1}{3} = (-\frac{2\cdot4+1}{4})\cdot(\frac{2\cdot3+1}{3}) = (-\frac{9}{4})\cdot\frac{7}{3} =-\frac{3}{4}\cdot7 = -\frac{21}{4} = -5\frac{1}{4}\\\\\\b) \ (-7\frac{1}{5}):(-3\frac{1}{5}) = (-\frac{36}{5}):(-\frac{16}{5}) = (-\frac{36}{5})\cdot(-\frac{5}{16}})=\frac{36}{16} = \frac{9}{4} = 2\frac{1}{4}[/tex]

[tex]c) \ (-1,4)\cdot(-5,07) = (-\frac{14}{10})\cdot(-\frac{507}{100}) = \frac{7098}{1000} = 7,098[/tex]

[tex]d) \ 0,056:(-0,7) = \frac{56}{1000}:(-\frac{7}{10}) = \frac{56}{1000}\cdot(-\frac{10}{7}) = -\frac{8}{100} = -0,08[/tex]