Zad. 1 WYmierne: A{-2,5; 0,(3); 0,75; 7/9; 3/2; 5 3/4; 1; 10} W ułamku: -2,5=-25/10=-5/2 0,(3)=1/3 0,75=3/4 7/9=7/9 3/2=3/2 5 3/4=20/4=5/1 10=10/10=1 1/1=1 Zad. 2 a) [latex](frac{3}{4}-frac{5}6y}): 1 frac{7}{12}= =(frac{18}{25}-frac{20}{24}): frac{19}{12}= = - frac{1}{12} * frac{12}{19}= - frac{1}{19} [/latex] b) [latex] (1 frac{1}{3})^{2} - sqrt 1frac{9}{16}= =(frac{4}{3})^2-sqrt{25}= =frac{16}{9}-frac{45}{9}= = - frac{25}{9}[/latex] c) [latex]sqrt{8}+sqrt{32}-sqrt{128}:sqrt{2}= [/latex] [latex]= (2sqrt{2}+4 sqrt{2}-16sqrt{2}):sqrt{2}= =-10sqrt{2} : sqrt{2}= -10[/latex] d) [latex]3^{12}:3^{-3}*3^{2}/3^{5}:3^{2}=[/latex] [latex]= 3^{17} : 3^{3}= 3^{15}[/latex] Zad. 3 40% -6 100% - x x= 100%-6/40=15[zł] SPR.: 15*40/100=6 zł. Zad. 4. c. początkowa: 15zł obniżka - >> 10% 15*10/100=1,50 zł <-- o tyle zmniejszono 14-1,5=13,5 [zł] < -- cena po obniżce
