Question

Ex 3 va rog dau coroana !!!!!!

Answer 1

Ai răspuns pe foaie.

Answer 2

$a) \frac{45}{100}*\frac{-1}{45}*100=-1\\\\b)\frac{1}{9}*\frac{-4}{7}+\frac{4}{7}*\frac{1}{9}=\frac{-4}{63}+\frac{4}{63}=0\\      \\c)\frac{3}{5}*(\frac{5}{3}+5)=\frac{3}{5}*(\frac{5}{3}+\frac{15}{3})=\frac{3}{5}*\frac{20}{3}=4\\     \\d)\frac{1}{2}*\frac{-3}{4}+\frac{1}{2}*(-\frac{1}{4})=\frac{-3}{8}-\frac{1}{8}=\frac{-4}{8} =\frac{-1}{2}$