Leysa 12.3-17.3+5.9-9.2+18.9-24.9+14.5-18.3+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6

$$12.3-17.3+5.9-9.2+18.9-24.9+14.5-18.3+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Meta

$$29.9$$

Lausnarskref

Dragðu 17.3 frá 12.3 til að fá út -5.

$$-5+5.9-9.2+18.9-24.9+14.5-18.3+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -5 og 5.9 til að fá 0.9.

$$0.9-9.2+18.9-24.9+14.5-18.3+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 9.2 frá 0.9 til að fá út -8.3.

$$-8.3+18.9-24.9+14.5-18.3+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -8.3 og 18.9 til að fá 10.6.

$$10.6-24.9+14.5-18.3+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 24.9 frá 10.6 til að fá út -14.3.

$$-14.3+14.5-18.3+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -14.3 og 14.5 til að fá 0.2.

$$0.2-18.3+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 18.3 frá 0.2 til að fá út -18.1.

$$-18.1+22.7-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -18.1 og 22.7 til að fá 4.6.

$$4.6-5.9+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 5.9 frá 4.6 til að fá út -1.3.

$$-1.3+10.3-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -1.3 og 10.3 til að fá 9.

$$9-23.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 23.1 frá 9 til að fá út -14.1.

$$-14.1+16.8-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -14.1 og 16.8 til að fá 2.7.

$$2.7-4.7+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 4.7 frá 2.7 til að fá út -2.

$$-2+3.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -2 og 3.9 til að fá 1.9.

$$1.9-12.6+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 12.6 frá 1.9 til að fá út -10.7.

$$-10.7+21.5-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -10.7 og 21.5 til að fá 10.8.

$$10.8-26.8+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 26.8 frá 10.8 til að fá út -16.

$$-16+13.2-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -16 og 13.2 til að fá -2.8.

$$-2.8-2.7+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 2.7 frá -2.8 til að fá út -5.5.

$$-5.5+18.3-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -5.5 og 18.3 til að fá 12.8.

$$12.8-7.7+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 7.7 frá 12.8 til að fá út 5.1.

$$5.1+19.2-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman 5.1 og 19.2 til að fá 24.3.

$$24.3-11.6+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 11.6 frá 24.3 til að fá út 12.7.

$$12.7+2.9-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman 12.7 og 2.9 til að fá 15.6.

$$15.6-15.9+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 15.9 frá 15.6 til að fá út -0.3.

$$-0.3+7.3-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -0.3 og 7.3 til að fá 7.

$$7-24.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 24.1 frá 7 til að fá út -17.1.

$$-17.1+19.6-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -17.1 og 19.6 til að fá 2.5.

$$2.5-15.5+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 15.5 frá 2.5 til að fá út -13.

$$-13+17.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -13 og 17.2 til að fá 4.2.

$$4.2-14.2+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 14.2 frá 4.2 til að fá út -10.

$$-10+19.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -10 og 19.4 til að fá 9.4.

$$9.4-18.7+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 18.7 frá 9.4 til að fá út -9.3.

$$-9.3+4.7-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -9.3 og 4.7 til að fá -4.6.

$$-4.6-11.6+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 11.6 frá -4.6 til að fá út -16.2.

$$-16.2+14.8-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -16.2 og 14.8 til að fá -1.4.

$$-1.4-23.2+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 23.2 frá -1.4 til að fá út -24.6.

$$-24.6+21.9-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -24.6 og 21.9 til að fá -2.7.

$$-2.7-14.1+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 14.1 frá -2.7 til að fá út -16.8.

$$-16.8+19.2-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -16.8 og 19.2 til að fá 2.4.

$$2.4-9.8+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 9.8 frá 2.4 til að fá út -7.4.

$$-7.4+6.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -7.4 og 6.7 til að fá -0.7.

$$-0.7-1.9+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 1.9 frá -0.7 til að fá út -2.6.

$$-2.6+13.5-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -2.6 og 13.5 til að fá 10.9.

$$10.9-19.3+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 19.3 frá 10.9 til að fá út -8.4.

$$-8.4+5.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -8.4 og 5.2 til að fá -3.2.

$$-3.2-9.1+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 9.1 frá -3.2 til að fá út -12.3.

$$-12.3+25.1-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -12.3 og 25.1 til að fá 12.8.

$$12.8-21.6+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 21.6 frá 12.8 til að fá út -8.8.

$$-8.8+13.7-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -8.8 og 13.7 til að fá 4.9.

$$4.9-8.3+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 8.3 frá 4.9 til að fá út -3.4.

$$-3.4+3.9-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -3.4 og 3.9 til að fá 0.5.

$$0.5-16.8+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 16.8 frá 0.5 til að fá út -16.3.

$$-16.3+12.1-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -16.3 og 12.1 til að fá -4.2.

$$-4.2-7.4+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 7.4 frá -4.2 til að fá út -11.6.

$$-11.6+23.7-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -11.6 og 23.7 til að fá 12.1.

$$12.1-12.1+17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 12.1 frá 12.1 til að fá út 0.

$$17.3-12.8+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 12.8 frá 17.3 til að fá út 4.5.

$$4.5+19.1-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman 4.5 og 19.1 til að fá 23.6.

$$23.6-24.6+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 24.6 frá 23.6 til að fá út -1.

$$-1+26.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman -1 og 26.7 til að fá 25.7.

$$25.7-16.8+13.9-5.9+9.7-12.3+15.6$$

Dragðu 16.8 frá 25.7 til að fá út 8.9.

$$8.9+13.9-5.9+9.7-12.3+15.6$$

Leggðu saman 8.9 og 13.9 til að fá 22.8.

$$22.8-5.9+9.7-12.3+15.6$$

Dragðu 5.9 frá 22.8 til að fá út 16.9.

$$16.9+9.7-12.3+15.6$$

Leggðu saman 16.9 og 9.7 til að fá 26.6.

$$26.6-12.3+15.6$$

Dragðu 12.3 frá 26.6 til að fá út 14.3.

$$14.3+15.6$$

Leggðu saman 14.3 og 15.6 til að fá 29.9.

$$29.9$$

Stuðull

$$\frac{13 \cdot 23}{2 \cdot 5} = 29\frac{9}{10} = 29.9$$