Whakaoti i te 2/5-10+12/5div2

$$\frac{ 2 }{ 5 } -10+ \frac{ 12 }{ 5 } \div 2$$

Aromātai

$$-\frac{42}{5}=-8.4$$

Ngā Upane Otinga

Me tahuri te 10 ki te hautau \frac{50}{5}.

$$\frac{2}{5}-\frac{50}{5}+\frac{\frac{12}{5}}{2}$$

Tā te mea he rite te tauraro o \frac{2}{5} me \frac{50}{5}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{2-50}{5}+\frac{\frac{12}{5}}{2}$$

Tangohia te 50 i te 2, ka -48.

$$-\frac{48}{5}+\frac{\frac{12}{5}}{2}$$

Tuhia te \frac{\frac{12}{5}}{2} hei hautanga kotahi.

$$-\frac{48}{5}+\frac{12}{5\times 2}$$

Whakareatia te 5 ki te 2, ka 10.

$$-\frac{48}{5}+\frac{12}{10}$$

Whakahekea te hautanga \frac{12}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$-\frac{48}{5}+\frac{6}{5}$$

Tā te mea he rite te tauraro o -\frac{48}{5} me \frac{6}{5}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{-48+6}{5}$$

Tāpirihia te -48 ki te 6, ka -42.

$$-\frac{42}{5}$$

Tauwehe

$$-\frac{42}{5} = -8\frac{2}{5} = -8.4$$