Kafli 1

$\mathrm{2,466,714,051}$

$\mathrm{11,921,830,106}$

$\mathrm{17,900}$

$\mathrm{468,800}$

$2·2·2·2·5$

$2·2·3·5$

$2·3·3·7$

$2·3·7·7$

ⓐ 14 er minna en eða jafnt og 27 ⓑ 19 mínus 2 er ekki jafnt og 8 ⓒ 12 er stærra en 4 deilt með 2 ⓓ x mínus 7 er minna en 1

ⓐ 19 er stærra en eða jafnt og 15 ⓑ 7 er jafnt og 12 mínus 5 ⓒ 15 deilt með 3 er minna en 8 ⓓ y plús 3 er stærra en 6

ⓐ $9$ ⓑ $64$

ⓐ $216$ ⓑ $64$

9 og 15, y 2 og 11 y 2 ,, $y^2$2 x 3 og $11y^2,$ $2x^3$8 x 3 $8x^3$

19 og 24, 8 x 2 og 3 x 2 ,, $8x^2$4 x 3 og $3x^2,$ $4x^3$6 x 3 $6x^3$

$4x^2,5x,17$

5x, 2y

$10x^2+16x+17$

$12y^2+9y+7$

ⓐ $14x^2-13$ ⓑ $12x÷2$

ⓐ $17y^2+19$ ⓑ 7y

ⓐ $x+11$ ⓑ $11a-14$

ⓐ $z+13$ ⓑ $8x-18$

ⓐ $4\left(p+q\right)$ ⓑ $4p+q$

ⓐ $2x-8$ ⓑ $2\left(x-8\right)$

$w-7$

$l-6$

$4q-8$

$7n+3$

ⓐ $\mathrm{-4}$ ⓑ 3 ⓒ 1

ⓐ $\mathrm{-8}$ ⓑ 5 ⓒ 5

ⓐ $\mathrm{-4}$ ⓑ 4

ⓐ $\mathrm{-11}$ ⓑ 11

ⓐ $17$ ⓑ $39$ ⓒ $\mathrm{-22}$ ⓓ $\mathrm{-11}$

ⓐ $23$ ⓑ $21$ ⓒ $\mathrm{-37}$ ⓓ $\mathrm{-49}$

ⓐ 6 ⓑ $\mathrm{-6}$

ⓐ 7 ⓑ $\mathrm{-7}$

ⓐ 2 ⓑ $\mathrm{-2}$

ⓐ 3 ⓑ $\mathrm{-3}$

ⓐ $\mathrm{-50}$ ⓑ $\mathrm{-17}$

ⓐ $\mathrm{-70}$ ⓑ $\mathrm{-36}$

ⓐ 2 ⓑ $\mathrm{-2}$

ⓐ 3 ⓑ $\mathrm{-3}$

ⓐ $\mathrm{-10}$ ⓑ 10

ⓐ $\mathrm{-11}$ ⓑ 11

ⓐ $8$ ⓑ $\mathrm{-22}$

ⓐ $19$ ⓑ $\mathrm{-4}$

ⓐ $\mathrm{-48}$ ⓑ 28 ⓒ $\mathrm{-63}$ ⓓ 60

ⓐ $\mathrm{-56}$ ⓑ 54 ⓒ $\mathrm{-28}$ ⓓ 39

ⓐ $\mathrm{-9}$ ⓑ 17

ⓐ $\mathrm{-8}$ ⓑ 16

ⓐ $\mathrm{-7}$ ⓑ 39

ⓐ $\mathrm{-9}$ ⓑ 23

$\mathrm{-63}$

$\mathrm{-84}$

ⓐ 81 ⓑ $\mathrm{-81}$

ⓐ 49 ⓑ $\mathrm{-49}$

ⓐ $\mathrm{-6}$ ⓑ 10

ⓐ $\mathrm{-1}$ ⓑ 17

ⓐ $\mathrm{-2}$ ⓑ 36

ⓐ $\mathrm{-19}$ ⓑ 9

$\left(9+\left(\mathrm{-16}\right)\right)+4;-3$

$\left(\mathrm{-8}+\left(\mathrm{-12}\right)\right)+7;-13$

ⓐ $14-\left(\mathrm{-23}\right);37$ ⓑ $\mathrm{-17}-21;-38$

ⓐ $11-\left(\mathrm{-19}\right);30$ ⓑ $\mathrm{-11}-18;-29$

$\mathrm{-5}\left(12\right);-60$

$8\left(\mathrm{-13}\right);-104$

$\mathrm{-63}÷\left(\mathrm{-9}\right);7$

$\mathrm{-72}÷\left(\mathrm{-9}\right);8$

$\frac{6}{10},\frac{9}{15},\frac{12}{20};$ svör geta verið mismunandi

$\frac{8}{10},\frac{12}{15},\frac{16}{20};$ svör geta verið mismunandi

$-\frac{7}{9}$

$-\frac{5}{9}$

$-\frac{23}{40}$

$-\frac{5}{8}$

$\frac{x}{y}$

$\frac{a}{b}$

$-\frac{4}{21}$

$-\frac{3}{16}$

$\mathrm{-33}a$

$\mathrm{-26}b$

$-\frac{21}{5p}$

$-\frac{15}{8q}$

$\frac{4}{15}$

$\frac{2}{3}$

$\frac{4}{5}$

$\frac{11}{14}$

$\frac{3}{4b}$

$\frac{4}{q}$

$-\frac{3}{4}$

$-\frac{5}{3}$

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

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

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

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

$-\frac{13}{14}$

$-\frac{7}{8}$

$-\frac{16}{x}$

$-\frac{22}{a}$

$\mathrm{-1}$

$-\frac{2}{3}$

$\frac{79}{60}$

$\frac{103}{60}$

$\frac{1}{96}$

$\frac{75}{224}$

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

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

ⓐ $\frac{27a-32}{36}$ ⓑ $\frac{2a}{3}$

ⓐ $\frac{24k-5}{30}$ ⓑ $\frac{2k}{15}$

$\frac{1}{90}$

$272$

$\frac{2}{7}$

ⓐ $\mathrm{-1}$ ⓑ $-\frac{1}{2}$

ⓐ $\frac{7}{6}$ ⓑ $-\frac{1}{4}$

$-\frac{1}{4}$

$-\frac{17}{8}$

$-\frac{1}{2}$

$\frac{2}{3}$

$-\frac{5}{2}$

$\frac{3}{2}$

$\mathrm{-27.4815}$

$\mathrm{-87.6148}$

$\frac{117}{500}$

$\frac{3}{125}$

$\mathrm{-0.875}$

$\mathrm{-0.375}$

$2.\stackrel{\text{—}}{45}$

$2.3\stackrel{\text{—}}{18}$

ⓐ $\mathrm{-2}$ ⓑ $\mathrm{-15}$

ⓐ $\mathrm{-9}$ ⓑ $\mathrm{-10}$

ⓐ $\frac{\mathrm{-24}}{1}$ ⓑ $\frac{357}{100}$

ⓐ $\frac{\mathrm{-19}}{1}$ ⓑ $\frac{841}{100}$

ⓐ $0.29,0.81\stackrel{\text{–}}{6}$ ⓑ $2.515115111\text{…}$

ⓐ $2.6\stackrel{\text{–}}{3},0.125$ ⓑ $0.418302\text{…}$

ⓐ $4,\sqrt{49}$ ⓑ $\mathrm{-3},4,\sqrt{49}$ ⓒ $\mathrm{-3},0.\stackrel{\text{–}}{3},\frac{9}{5},4,\sqrt{49}$ ⓓ $\text{−}\sqrt{2}$ ⓔ $\mathrm{-3},\text{−}\sqrt{2},0.\stackrel{\text{–}}{3},\frac{9}{5},4,\sqrt{49}$

ⓐ $6,\sqrt{121}$ ⓑ $\text{−}\sqrt{25},\mathrm{-1},6,\sqrt{121}$ ⓒ $\text{−}\sqrt{25},-\frac{3}{8},\mathrm{-1},6,\sqrt{121}$ ⓓ $2.041975\text{…}$ ⓔ $\text{−}\sqrt{25},-\frac{3}{8},\mathrm{-1},6,\sqrt{121},2.041975\text{…}$

$32r+29s$

$41m+6n$

$1\frac{7}{15}$

$1\frac{2}{9}$

32x

$\mathrm{-63}y$

ⓐ $-\frac{7}{9}$ ⓑ $\mathrm{-1.2}$ ⓒ $14$ ⓓ $\frac{9}{4}$

ⓐ $-\frac{7}{13}$ ⓑ $\mathrm{-8.4}$ ⓒ $46$ ⓓ $\frac{5}{2}$

ⓐ $\frac{1}{4}$ ⓑ $\mathrm{-7}$ ⓒ $\frac{10}{3}$

ⓐ $\frac{1}{18}$ ⓑ $-\frac{5}{4}$ ⓒ $\frac{5}{3}$

$\mathrm{-48}a$

$\mathrm{-92}x$

$\frac{5}{49}$

$\frac{11}{25}$

$20y+50$

$12z+16$

$4x+8$

$6x+42$

$5y+3$

$4n+9$

$70+15p$

$4+35d$

$\mathrm{-18}m-15$

$\mathrm{-48}n-66$

$\mathrm{-10}+15a$

$\mathrm{-56}+105y$

$\text{−}z+11$

$\text{−}x+4$

$3-3x$

$2x-20$

$5x-66$

$7x-13$

$\text{8 pund}.\text{15 únsur}$

$15\text{°}\text{C}$

$5\text{°}\text{C}$

$59\text{°}\text{F}$

$50\text{°}\text{F}$

$2·43$

$2·2·3·11$

$3·3·7·11$

$2·2·2·2·3·3·3$

$2·2·2·2·3·3·3·5$

y mínus 1 er stærra en 6; mismunur y og eins er stærri en sex

$x^3\text{og}8x^3,14\text{og}5$

$16\text{og}4,16b^2\text{og}9b^2$

$15x^2,6x,2$

$10y^3,y,2$

13x

7c

$10u+3$

$22a+1$

$17x^2+20x+16$

$14-9$

$9·7$

$36÷9$

$8x+3x$

$\frac{y}{3}$

$8\left(y-9\right)$

$c+3$

$2n-7$

ⓐ $\mathrm{-2}$ ⓑ 6

ⓐ $\mathrm{-12}$ ⓑ 12

ⓐ < ⓑ $=$

$5,\mathrm{-5}$

ⓐ $\mathrm{-19}$ ⓑ $\mathrm{-33}$

$\mathrm{-80}$

$\mathrm{-22}$

$\mathrm{-9}$

$\mathrm{-39}$

$\mathrm{-59}$

$\mathrm{-51}$

$\mathrm{-2}$

$\mathrm{-2}$

$\mathrm{-8}$

$\mathrm{-11}$

ⓐ $540 milljónir ⓑ $\text{−}\mathrm{\$27}$ milljarðar

$\mathrm{-32}$

$\mathrm{-63}$

$\mathrm{-6}$

$\mathrm{-4}$

$\mathrm{-12}$

$\mathrm{-47}$

$\mathrm{-16}$

$\mathrm{-9}$

$\mathrm{-29}$

ⓐ $\mathrm{-47}$ ⓑ 16

ⓐ $\mathrm{-4}$ ⓑ 10

$\mathrm{-8}$

$\mathrm{-16}$

ⓐ $\mathrm{-5}$ ⓑ 25

$\mathrm{-56}$

$\left(3+\left(\mathrm{-15}\right)\right)+7;-5$

$10-\left(\mathrm{-18}\right);28$

$\mathrm{-5}-\left(\mathrm{-30}\right);25$

$\mathrm{-3}·15;-45$

$\mathrm{-60}÷\left(\mathrm{-20}\right);3$

$\frac{\mathrm{-6}}{a+b}$

$\mathrm{-10}\left(p-q\right)$

$96\text{°}$

$\text{−}\mathrm{\$28}$

$\text{−}\mathrm{\$3600}$

$\frac{6}{16},\frac{9}{24},\frac{12}{32}$ svör geta verið mismunandi

$\frac{10}{18},\frac{15}{27},\frac{20}{36}$ svör geta verið mismunandi

$-\frac{5}{11}$

$-\frac{12}{7}$

$\frac{10}{21}$

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

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

$\frac{27}{40}$

$\frac{1}{4}$

$-\frac{1}{6}$

$-\frac{21}{50}$

$\frac{11}{30}$

$\frac{20}{11}$

9n

$\mathrm{-34}$

$\frac{9}{8}$

$\frac{4}{9}$

$\frac{33}{4x}$

$-\frac{4}{9}$

$\frac{10u}{9v}$

$\mathrm{-10}$

$-\frac{1}{16}$

$-\frac{10}{9}$

$-\frac{2}{5}$

$\frac{2m}{3n}$

$\frac{5}{2}$

$\frac{16}{3}$

$\frac{1}{3}$

$\frac{3}{5}$

$2\frac{8}{17}$

$\frac{9}{7}$

$\mathrm{-8}$

$\frac{11}{6}$

$\frac{5}{2}$

$\frac{r}{s+10}$

$\frac{x-y}{\mathrm{-3}}$

ⓐ $\left(2\right)\left(\frac{3}{4}\right);\frac{3}{2}$ bollar ⓑ svör geta verið mismunandi

$\frac{11}{13}$

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

$-\frac{5}{8}$

$\frac{7}{17}$

$-\frac{16}{13}$

$\frac{4}{15}$

$\frac{1}{2}$

$\frac{5}{7}$

$\frac{5y-7}{8}$

$-\frac{38}{u}$

$\frac{1}{5}$

$-\frac{2}{9}$

$-\frac{1}{4}$

$\frac{n-4}{5}$

$-\frac{5}{24}$

$\frac{2}{9}$

$\frac{9}{14}$

$\frac{4}{9}$

$\frac{29}{24}$

$\frac{1}{48}$

$\frac{7}{24}$

$\frac{37}{120}$

$\frac{17}{105}$

$-\frac{53}{40}$

$\frac{1}{12}$

$\frac{15}{8}$

$\frac{4x+3}{12}$

$\frac{5y-12}{20}$

ⓐ $\frac{5}{6}$ ⓑ 4

ⓐ $\frac{25n}{16}$ ⓑ $\frac{25n-16}{30}$

$\frac{5}{4}$

$\frac{1}{24}$

$\frac{13}{18}$

$\frac{\mathrm{-28}-15y}{60}$

$\frac{33}{64}$

$\frac{49}{25}$

$\frac{15}{4}$

$\frac{5}{21}$

$\frac{7}{9}$

$\mathrm{-5}$

$\frac{19}{12}$

$\frac{23}{24}$

$\frac{11}{5}$

$\frac{13}{3}$

ⓐ $-\frac{1}{2}$ ⓑ $\mathrm{-1}$

ⓐ $\frac{1}{5}$ ⓑ $\mathrm{-1}$

ⓐ $\frac{1}{5}$ ⓑ $\frac{6}{5}$

$-\frac{1}{9}$

$-\frac{5}{11}$

$\frac{7}{8}$ jardi

$\mathrm{-11.0009}$

$\mathrm{-9.23}$

$\mathrm{-40.91}$

$\mathrm{-7.22}$

$\mathrm{-27.5}$

$\mathrm{-4.89}$

$\mathrm{-11.653}$

$\mathrm{-4.8}$

$\frac{1}{25}$

$\frac{13}{25}$

$\frac{5}{4}$

$\frac{3}{8}$

$\frac{19}{200}$

$\mathrm{-12.4}$

$1.\stackrel{\text{—}}{36}$

$0.\stackrel{\text{—}}{135}$

$\mathrm{-2}$

$\mathrm{-1}$

ⓐ $\frac{5}{1}$ ⓑ $\frac{319}{100}$

ⓐ $\frac{\mathrm{-12}}{1}$ ⓑ $\frac{9279}{1000}$

ⓐ $0.75,0.22\stackrel{\text{–}}{3}$ ⓑ $1.39174\text{…}$

ⓐ $0.4\stackrel{\text{–}}{5},3.59$ ⓑ $1.919293\text{…}$

ⓐ $0,\sqrt{36},9$ ⓑ $\mathrm{-8},0,\sqrt{36},9$ ⓒ $\mathrm{-8},0,\frac{12}{5},\sqrt{36},9$ ⓓ $1.95286\text{…}$ ⓔ $\mathrm{-8},0,1.95286\text{…},\frac{12}{5},\sqrt{36},9$

ⓐ engin ⓑ $\text{−}\sqrt{100},\mathrm{-7},\mathrm{-1}$ ⓒ $\text{−}\sqrt{100},\mathrm{-7},-\frac{8}{3},\mathrm{-1},0.77,3\frac{1}{4}$ ⓓ engin ⓔ $\text{−}\sqrt{100},\mathrm{-7},-\frac{8}{3},\mathrm{-1},0.77,3\frac{1}{4}$

12x

$y+40$

$\frac{7}{8}$

$\frac{49}{11}$

$\mathrm{-63}$

$1\frac{5}{6}$

28a

$\mathrm{-75}m$

10p

$27m+\left(\mathrm{-21}n\right)$

$\frac{5}{4}g+\frac{1}{2}h$

$2.43p+8.26q$

ⓐ $-\frac{2}{5}$ ⓑ $\mathrm{-4.3}$ ⓒ 8 ⓓ $\frac{10}{3}$

ⓐ $\frac{7}{6}$ ⓑ 0.075 ⓒ $\mathrm{-23}$ ⓓ $-\frac{1}{4}$

ⓐ $\frac{1}{6}$ ⓑ $-\frac{4}{3}$ ⓒ $\frac{10}{7}$

ⓐ $\frac{12}{11}$ ⓑ $-\frac{10}{11}$ ⓒ $-\frac{1}{4}$

$36d+90$

$32y+72$

$6c-78$

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

$5y-3$

$3+8r$

$rs-18r$

$yp+4p$

$\mathrm{-28}p-7$

$\mathrm{-3}x+18$

$\mathrm{-3}x+7$

$\mathrm{-3}y-8$

$\mathrm{-33}c+26$

$\text{−}a+19$

$4m-10$

$22n+9$

$72x-25$

$6c+34$

$12y+63$

$53\frac{1}{3}$ jardar

$17\frac{1}{2}$ tonn

$96$ teskeiðar

$224$ únsur

$1\frac{1}{4}$ gallon

$30\text{°}\text{C}$

$40\text{°}\text{C}$

$22.2\text{°}\text{C}$

$\text{−}17.8\text{°}\text{C}$

$41\text{°}\text{F}$

$14\text{°}\text{F}$

$71.6\text{°}\text{F}$