4. kafli

$11$

$-2>-5$

$2\cdot 2\cdot 2\cdot 2\cdot 3$

Svör geta verið mismunandi. Rétt svör eru meðal annars $\frac{10}{12},\frac{15}{18},\frac{50}{60},$ 10/12, 15/18, 50/60 o.s.frv.

$3$

$\frac{1}{12}$

$\frac{13}{5}$

$5x+5$

$\frac{5}{6}$

$\frac{10}{12},\frac{15}{18}$

$2$

$2\frac{3}{4}$

$\frac{7}{2}$

$1$

$y=6$

$-6$

$\frac{5}{3}=1\frac{2}{3}$

$\frac{13}{8}=1\frac{5}{8}$

$1\frac{2}{7}$

$1\frac{3}{4}$

$\frac{11}{8}$

$\frac{11}{6}$

$1\frac{6}{7}.$

$1\frac{5}{9}$

$3\frac{2}{7}$

$4\frac{4}{11}$

$\frac{26}{7}$

$\frac{23}{8}$

$\frac{50}{11}$

$\frac{34}{3}$

Rétt svör eru meðal annars $\frac{6}{10},\frac{9}{15},$ 6/10, 9/15 og 1 2 2 0, $\frac{12}{20}.$

Rétt svör eru meðal annars $\frac{8}{10},\frac{12}{15},$ 8/10, 12/15 og 1 6 2 0, $\frac{16}{20}.$

$\frac{18}{21}$

$\frac{30}{100}$

$\frac{2}{3}$

$\frac{3}{4}$

$-\frac{3}{4}$

$-\frac{2}{3}$

$-\frac{9}{7}$

$-\frac{9}{5}$

$\frac{23}{40}$

$\frac{5}{8}$

$\frac{x}{y}$

$\frac{a}{b}$

$\frac{3}{10}$

$\frac{5}{12}$

$\frac{2}{15}$

$\frac{21}{40}$

$\frac{5}{14}$

$\frac{14}{27}$

$-\frac{4}{21}$

$-\frac{3}{16}$

$-\frac{9}{14}$

$-\frac{10}{21}$

$\frac{21}{5p}$

$\frac{15}{8q}$

$\frac{4}{5}$

$\frac{5}{4}$

$\frac{4}{15}$

$\frac{2}{3}$

$\frac{9}{4}$

$-\frac{85}{6}$

$\frac{5}{8}$

$\frac{7}{8}$

$\frac{5}{2}$

$\frac{9s}{14}$

$\frac{5y}{6}$

$\frac{a-b}{cd}$

$\frac{p+q}{r}$

$\frac{4}{5}$

$\frac{11}{14}$

$-\frac{2}{7}$

$-\frac{10}{3}$

$\frac{3}{4b}$

$\frac{4}{q}$

$\frac{25}{49}.$

$\frac{1}{2}$

$-\frac{3}{5},\frac{3}{\mathrm{-5}}$

$\frac{\mathrm{-2}}{7},\frac{2}{\mathrm{-7}}$

$\frac{10}{9}$

$\frac{1}{2}$

$\frac{\mathrm{-3}}{4}$

$-\frac{2}{3}$

$\frac{2}{9}$

$\frac{8}{5}$

$\frac{5}{8}$

$\frac{5}{6}$

$\frac{5}{6}$

$\frac{x+3}{4}$

$\frac{y+5}{8}$

$\frac{1}{d}$

$\frac{3}{m}$

$\frac{9p}{8}$

$\frac{9q}{5}$

$-\frac{2}{3}$

$-\frac{2}{3}$

$\frac{3}{8}$; líkön geta verið mismunandi.

$\frac{1}{6}$; líkön geta verið mismunandi.

$\frac{3}{7}$

$\frac{1}{2}$

$\frac{x-2}{7}$

$\frac{y-13}{14}$

$-\frac{16}{x}$

$-\frac{22}{a}$

$-\frac{2}{3}$

$\frac{9}{12},\frac{10}{12}$

$-\frac{35}{60},\frac{44}{60}$

$\frac{52}{96},\frac{51}{96}$

$\frac{72}{224},\frac{189}{224}$

$\frac{7}{12}$

$\frac{7}{10}$

$\frac{5}{8}$

$\frac{1}{2}$

$\frac{79}{60}$

$\frac{103}{60}$

$\frac{1}{96}$

$\frac{75}{224}$

$\frac{37}{210}$

$-\frac{25}{96}$

$\frac{3y+14}{18}$

$\frac{5x+14}{30}$

$\frac{1}{90}$

$\frac{2}{7}$

$-\frac{3}{4}$

$-\frac{23}{8}$

$-\frac{1}{2}$

$\frac{2}{3}$

$-\frac{5}{2}$

$\frac{3}{2}$

$4\frac{2}{3}$

$3\frac{1}{2}$

$5\frac{6}{7}$

$7\frac{9}{11}$

$16\frac{1}{2}$

$15\frac{1}{3}$

$9\frac{1}{3}$

$6\frac{3}{5}$

$\frac{3}{4}$

$\frac{4}{5}$

$\frac{9}{5}$

$\frac{5}{3}$

$\frac{2}{3}$

$\frac{3}{4}$

$\frac{2}{3}$

$\frac{2}{5}$

$2\frac{2}{3}$

$1\frac{5}{7}$

$2\frac{2}{3}$

$1\frac{5}{7}$

$6\frac{7}{12}$

$12\frac{3}{10}$

$4\frac{7}{10}$

$2\frac{11}{12}$

$-\frac{41}{8}$

$-\frac{757}{63}$

$-\frac{1}{2}$

$-\frac{4}{15}$

$-\frac{6}{7}$

$-\frac{19}{3}$

$\frac{23}{2}$

$\frac{n}{7}=\mathrm{-21};n=\mathrm{-147}$

$\frac{n}{8}=\mathrm{-56};n=\mathrm{-448}$

$\frac{q}{\mathrm{-8}}=72;q=\mathrm{-576}$

$\frac{p}{\mathrm{-9}}=81;p=\mathrm{-729}$

$\frac{2}{5}f=16;f=40$

$\frac{3}{4}f=21;f=28$

$\frac{n}{\frac{2}{3}}=\frac{5}{12};n=\frac{5}{18}$

$\frac{c}{\frac{3}{8}}=\frac{4}{9};c=\frac{1}{6}$

$\frac{5}{8}+x=\frac{1}{4};x=-\frac{3}{8}$

$1\frac{3}{4}-x=\frac{5}{6};x=\frac{11}{12}$

$1\frac{2}{3}$

$2\frac{3}{5}$

$3\frac{1}{9}$

$3\frac{2}{15}$

$\frac{7}{5}$

$\frac{17}{6}$

$\frac{19}{7}$

$\frac{32}{9}$

Svör geta verið mismunandi. Rétt svör eru meðal annars 2 6, 3 9, 4 1 2, 2/6, 3/9 og 4/12. $\frac{2}{6},\frac{3}{9},\frac{4}{12}.$

Svör geta verið mismunandi. Rétt svör eru meðal annars 1 0 1 2, 1 5 1 8, 2 0 2 4, 10/12, 15/18 og 20/24. $\frac{10}{12},\frac{15}{18},\frac{20}{24}.$

Svör geta verið mismunandi. Rétt svör eru meðal annars 1 0 1 8, 1 5 2 7, 2 0 3 6, 10/18, 15/27 og 20/36. $\frac{10}{18},\frac{15}{27},\frac{20}{36}.$

$\frac{1}{3}$

$\frac{3}{4}$

$-\frac{5}{11}$

$-\frac{12}{7}$

$\frac{10}{21}$

$-\frac{7}{8}$

$\frac{x}{y}$

$-\frac{x}{4y}$

$\frac{2x^2}{3y}$

$\frac{1}{3}$

$\frac{5}{18}$

$\frac{2}{15}$

$\frac{27}{40}$

$\frac{1}{4}$

$-\frac{1}{6}$

$-\frac{2}{9}$

$-\frac{21}{50}$

$\frac{11}{30}$

$\frac{20}{11}$

9n

7p

$\frac{3}{8}$

$\frac{8}{27}$

$\frac{1296}{625}$

$\frac{4}{3}$

$-\frac{17}{5}$

$\frac{8}{11}$

$-\frac{1}{19}$

$\frac{16}{15}$

$-\frac{5}{4}$

$\frac{18}{5y}$

$\frac{25}{2c}$

$-\frac{3}{4}$

$\frac{2}{9}$

$\frac{14r}{15s}$

$-\frac{1}{25}$

$\frac{8}{7}$

$\frac{1}{8}$ jard

$\frac{44}{21}$

$\frac{35}{8}$

$-\frac{16}{3}$

$-\frac{63}{16}$

$\frac{3}{2}$

$-\frac{4}{3}$

$\frac{7v}{13}$

$\frac{a}{b}$

$\frac{A}{3-B}$

$\frac{3}{2}$

$-\frac{15}{22}$

$-\frac{3}{10}$

$\frac{1}{6}$

$\frac{3r}{5s}$

$\frac{9}{2y}$

$-\frac{1}{18}$

$\frac{\mathrm{-4}}{9},-\frac{4}{9}$

$\frac{13}{\mathrm{-6}},\frac{\mathrm{-13}}{6}$

$\frac{12}{7}$

$\frac{5}{2}$

$\frac{23}{4}$

$-\frac{1}{3}$

$\frac{4}{5}$

$-\frac{1}{2}$

$\frac{5}{6}$

$\frac{26}{25}$

$\frac{11}{6}$

$\frac{5}{2}$

$\frac{51}{20}$

$\frac{18}{7}$

$\frac{7}{10}$

$\frac{3}{4}$

$\frac{7}{9}$

$\frac{16}{15}$

$\frac{y+2}{3}$

$\frac{14}{q}$

$\frac{9a}{7}$

$\frac{\mathrm{-4}x}{5}$

$-\frac{3}{4}$

$-\frac{7}{8}$

$\frac{8}{19}$

$-\frac{13}{12}$

$\frac{1}{2}$

$\frac{1}{5}$

$\frac{5}{13}$

$\frac{1}{6}$

$-\frac{8}{3}$

$\frac{x-8}{19}$

$\frac{11z-8}{13}$

$-\frac{14}{c}$

$-\frac{55}{v}$

$\frac{3d}{11}$

$-\frac{14s}{3}$

$\frac{2}{7}$

$-\frac{3}{11}$

$-\frac{1}{8}$

$\frac{6-s}{11}$

$-\frac{2}{9}$

$\frac{49}{27}$

$\frac{1}{4}$ bolli

Nei, summa hlutanna er $\frac{13}{12}$, sem er stærra en 1. Svör geta verið mismunandi.

$\frac{5}{20},\frac{4}{20}$

$\frac{14}{24},\frac{15}{24}$

$\frac{33}{48},-\frac{20}{48}$

$\frac{20}{60},\frac{45}{60},\frac{36}{60}$

$\frac{9}{20}$

$\frac{11}{24}$

$\frac{3}{8}$

$\frac{2}{3}$

$\frac{23}{20}$

$\frac{19}{24}$

$\frac{1}{48}$

$\frac{1}{24}$

$\frac{1}{12}$

$\frac{7}{60}$

$-\frac{53}{80}$

$-\frac{291}{245}$

$\frac{1}{20}$

$\frac{11}{40}$

$\frac{11}{6}$

$\frac{7}{10}$

$\frac{3y+4}{6}$

$\frac{4x-5}{20}$

$\frac{3}{4}$

$\frac{11}{24}$

$\frac{7}{18}$

$-\frac{2}{15}$

$\frac{\mathrm{-33}-8x}{88}$

$\frac{16}{39}$

$\frac{1}{81}$

$\frac{36}{25}$

$\frac{60}{7}$

$\frac{15}{2}$

$\frac{3}{13}$

$\frac{19}{30}$

$\frac{91}{60}$

$\frac{11}{40}$

$\frac{5}{6}$

$\frac{22}{7}$

$\frac{4}{15}$

$-\frac{9}{16}$

Hún þarf $2\frac{3}{8}$ bolla.

$3\frac{2}{3}$

$3\frac{2}{3}$

$7\frac{5}{9}$

$11\frac{1}{3}$

$11\frac{1}{3}$

$\frac{1}{2}$

$1\frac{1}{6}$

$6\frac{2}{5}$

$1\frac{7}{9}$

$\frac{5}{6}$

$7\frac{11}{12}$

$16\frac{1}{6}$

$5\frac{11}{20}$

$\mathrm{-1}\frac{11}{24}$

$6\frac{17}{18}$

$\frac{7}{9}$

$8\frac{3}{4}$

$\frac{4}{15}$

$5\frac{3}{5}$

$\frac{1}{16}$

$13\frac{1}{13}$

$7\frac{1}{30}$

$\frac{10}{27}$

$2\frac{7}{45}$

$\frac{17}{24}$

$\frac{7}{12}$ jardar

$13\frac{1}{4}$ tommur

$m=\frac{1}{2}$

$h=-\frac{2}{3}$

c = −1

z = −1

$p=\frac{37}{40}$

$k=-\frac{7}{15}$

$k=\frac{18}{7}$

$v=-\frac{11}{3}$

b = −27

x = −256

q = 160

s = 45

y = −42

$k=\frac{17}{20}$

p = 100

m = −16

b = −21

v = 36

y = 0

$g=\frac{1}{9}$

$q=-\frac{3}{4}$

$n=\frac{14}{5}$

$y=-\frac{25}{24}$

$d=-\frac{8}{15}$

$\frac{n}{6}=\mathrm{-24};n=\mathrm{-144}$

$\frac{m}{\mathrm{-7}}=\mathrm{-8};m=56$

$\frac{f}{\mathrm{-4}}=\mathrm{-20};f=80$

$\frac{g}{9}=14;g=126$

$\frac{2}{5}q=20;q=50$

$\frac{4}{9}p=\mathrm{-28};p=\mathrm{-63}$

$\frac{h}{2}=43;h=86$

$\frac{a}{\frac{2}{3}}=\frac{3}{4};a=\frac{1}{2}$

$\frac{3}{4}+x=\frac{1}{8};x=-\frac{5}{8}$

$y-\frac{1}{3}=-\frac{1}{6};y=\frac{1}{6}$

$\frac{5}{9}$

$\frac{3}{2}=1\frac{1}{2}$

$5\frac{8}{11}$

$\frac{49}{5}$

$-\frac{3}{4}$

$-\frac{x}{y}$

$-\frac{4}{7}$

$\frac{24m}{11}$

$\frac{4}{15}$

$\frac{4}{15}$

$-\frac{5}{2b}$

$-\frac{268}{11}$

$\frac{V}{h-6}$

$-\frac{2}{9}$

$\frac{7}{36}$

$\frac{5}{8}$

$\frac{3}{5}$

$\frac{x+7}{10}$

$\frac{1}{2}$

$-\frac{19}{15}$

$\frac{8}{15}$

$\frac{9}{24}$ og $\frac{20}{24}$

$\frac{20}{60},\frac{45}{60}$ 2 0 6 0, 4 5 6 0, 20/60, 45/60 og 4 8 6 0, 48/60 $\frac{48}{60}$

$\frac{1}{4}$

$-\frac{77}{90}$

$\frac{3y-10}{30}$

$\frac{14d}{11}$

$\frac{256}{225}$

$13\frac{2}{3}$

$8\frac{1}{11}$

$5\frac{1}{10}$

$1\frac{1}{3}$

$n=-\frac{5}{11}$

$h=-\frac{51}{40}$

z = −23

$q-\frac{1}{10}=\frac{1}{2};q=\frac{3}{5}$

$\frac{3}{8}y=24;y=64$

$\frac{23}{7}$

$\frac{1}{4}$

$\frac{1}{4}$

16u