Whakaoti i te 1.8+-18/5--61/10=

$$1.8 + \frac { - 18 } { 5 } - - 6 \frac { 1 } { 10 } =$$

Aromātai

$$4.3$$

Ngā Upane Otinga

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

$$1.8-\frac{18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

Me tahuri ki tau ā-ira 1.8 ki te hautau \frac{18}{10}. Whakahekea te hautanga \frac{18}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$\frac{9}{5}-\frac{18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

Tā te mea he rite te tauraro o \frac{9}{5} me \frac{18}{5}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{9-18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

Tangohia te 18 i te 9, ka -9.

$$-\frac{9}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

Whakareatia te 6 ki te 10, ka 60.

$$-\frac{9}{5}-\left(-\frac{60+1}{10}\right)$$

Tāpirihia te 60 ki te 1, ka 61.

$$-\frac{9}{5}-\left(-\frac{61}{10}\right)$$

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

$$-\frac{9}{5}+\frac{61}{10}$$

Ko te maha noa iti rawa atu o 5 me 10 ko 10. Me tahuri -\frac{9}{5} me \frac{61}{10} ki te hautau me te tautūnga 10.

$$-\frac{18}{10}+\frac{61}{10}$$

Tā te mea he rite te tauraro o -\frac{18}{10} me \frac{61}{10}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{-18+61}{10}$$

Tāpirihia te -18 ki te 61, ka 43.

$$\frac{43}{10}$$

Tauwehe

$$\frac{43}{2 \cdot 5} = 4\frac{3}{10} = 4.3$$