[latex]a) \ a + 17,2 = 36 \ a = 36 - 17,2 \ a = 18,8 \ Spr: 17,2 + 18,8 = 36[/latex] [latex]b) \ 2 frac{1}{2} -b = 1 frac{1}{3} \ \ -b = 1 frac{1}{3} -2 frac{1}{2} \ \ -b = frac{4}{3} - frac{5}{2} \ \ -b = frac{8}{6} - frac{15}{6} \ \ -b = - frac{7}{6} ||:(-1) \ \ b = frac{7}{6} \ \ Spr:2 frac{1}{2} -frac{7}{6}= frac{5}{2} -frac{7}{6}=frac{15}{6} -frac{7}{6}= frac{8}{6} =1 frac{2}{6} =1 frac{1}{3}[/latex] [latex]c) \ c-4,2 = 6 frac{1}{2} \ c - 4,2=6,5 \ c=6,5+4,2 \ c=10,7 \ Spr:10,7-4,2=6,5[/latex] [latex]d) \ 3 frac{1}{3} *d=2 frac{2}{9} \ \ frac{10}{3} *d= frac{20}{9} ||* frac{3}{10} \ \ d = frac{20}{9}* frac{3}{10} \ \ d= frac{60}{90} \ \ d= frac{6}{9} \ \ d= frac{2}{3} \ \ Spr: 3 frac{1}{3} *frac{2}{3}=frac{10}{3} *frac{2}{3}= frac{20}{9} =2 frac{2}{9}[/latex] [latex]e) \ e:5= frac{1}{2} \ \ e: frac{5}{1} = frac{1}{2} \ \ frac{1}{5}*e = frac{1}{2}||*5 \ \ e= frac{1}{2} *5 \ \ e= frac{5}{2} \ \ Spr: frac{5}{2}:5= frac{5}{2}*frac{1}{5}= frac{5}{10}= frac{1}{2}[/latex] [latex]f) \ 2,1:f=0,2 \ \ frac{21}{10} * frac{1}{f} = frac{2}{10} ||*f \ \ frac{21}{10} = frac{2}{10}*f ||* frac{10}{2} \ \ f=frac{21}{10} *frac{10}{2} \ \ f= frac{21}{2} \ \ f=10 frac{1}{2} \ \ f=10,5 \ \ Spr: 2,1:10,5=0,2[/latex]
a) a+17,2=36 a=36-17.2 a=18,8 Spr: 18,8+17,2=36 b) 2 1/2- b = 1 1/3 -b=1 1/3-2 1/2 -b=4/3-5/2 -b=8/6-15/6 -b=-(7/6) /:(-1) b=7/6 b=1 1/6 Spr: 2 1/2-1 1/6=5/2-7/6=15/6-7/6=8/6= 1 1/3 c) c-4,2 = 6 1/2 c=6 1/2+4,2 c=6,5+4,2 c=10,7 Spr: 10,7-4,2 =6,5= 6 1/2 d) 3 1/3 * d = 2 2/9 10/3d=20/9 /:(10/3) d=20/9*3/10 d=60/90 d=2/3 Spr: 3 1/3 * 2/3=10/3*2/3=20/3=2 2/9 e) e : 5 = 1/2 e/6=1/2 2*e=5*1 2e=5 /:2 e=5/2 Spr: 5/2 : 5 =5/2*1/5=5/10=1/2 f) 2,1 : f = 0,2 2,1/f=1/5 1*f=5*2,1 f=10,5 Spr: 2,1 : 10,5=21/10 : 10 1/2=21/10:21/2=21/10*2/21=1/5=0,2
