Issolvi 1-(12+8)+8(4-5)+8(5-9)+2=

$$1 - ( 12 + 8 ) + 8 ( 4 - 5 ) + 8 ( 5 - 9 ) + 2 =$$

Evalwa

$$-57$$

Passi tas-Soluzzjonijiet

Żid 12 u 8 biex tikseb 20.

$$1-20+8\left(4-5\right)+8\left(5-9\right)+2$$

Naqqas 20 minn 1 biex tikseb -19.

$$-19+8\left(4-5\right)+8\left(5-9\right)+2$$

Naqqas 5 minn 4 biex tikseb -1.

$$-19+8\left(-1\right)+8\left(5-9\right)+2$$

Immultiplika 8 u -1 biex tikseb -8.

$$-19-8+8\left(5-9\right)+2$$

Naqqas 8 minn -19 biex tikseb -27.

$$-27+8\left(5-9\right)+2$$

Naqqas 9 minn 5 biex tikseb -4.

$$-27+8\left(-4\right)+2$$

Immultiplika 8 u -4 biex tikseb -32.

$$-27-32+2$$

Naqqas 32 minn -27 biex tikseb -59.

$$-59+2$$

Żid -59 u 2 biex tikseb -57.

$$-57$$

Fattur

$$-57$$