Whakaoti i te 18+-18/5--61/10=

$$18 + \frac { - 18 } { 5 } - - 6 \frac { 1 } { 10 } =$$

Aromātai

$$\frac{41}{2}=20.5$$

Ngā Upane Otinga

Ka taea te hautanga \frac{-18}{5} te tuhi anō ko -\frac{18}{5} mā te tango i te tohu tōraro.

$$18-\frac{18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

Me tahuri te 18 ki te hautau \frac{90}{5}.

$$\frac{90}{5}-\frac{18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

Tā te mea he rite te tauraro o \frac{90}{5} me \frac{18}{5}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{90-18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

Tangohia te 18 i te 90, ka 72.

$$\frac{72}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

Whakareatia te 6 ki te 10, ka 60.

$$\frac{72}{5}-\left(-\frac{60+1}{10}\right)$$

Tāpirihia te 60 ki te 1, ka 61.

$$\frac{72}{5}-\left(-\frac{61}{10}\right)$$

Ko te tauaro o -\frac{61}{10} ko \frac{61}{10}.

$$\frac{72}{5}+\frac{61}{10}$$

Ko te maha noa iti rawa atu o 5 me 10 ko 10. Me tahuri \frac{72}{5} me \frac{61}{10} ki te hautau me te tautūnga 10.

$$\frac{144}{10}+\frac{61}{10}$$

Tā te mea he rite te tauraro o \frac{144}{10} me \frac{61}{10}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{144+61}{10}$$

Tāpirihia te 144 ki te 61, ka 205.

$$\frac{205}{10}$$

Whakahekea te hautanga \frac{205}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.

$$\frac{41}{2}$$

Tauwehe

$$\frac{41}{2} = 20\frac{1}{2} = 20.5$$