Whakaoti i te (7/4-9-1/2)(-2)

$$( \frac { 7 } { 4 } - 9 - \frac { 1 } { 2 } ) ( - 2 )$$

Aromātai

$$\frac{31}{2}=15.5$$

Ngā Upane Otinga

Me tahuri te 9 ki te hautau \frac{36}{4}.

$$\left(\frac{7}{4}-\frac{36}{4}-\frac{1}{2}\right)\left(-2\right)$$

Tā te mea he rite te tauraro o \frac{7}{4} me \frac{36}{4}, me tango rāua mā te tango i ō raua taurunga.

$$\left(\frac{7-36}{4}-\frac{1}{2}\right)\left(-2\right)$$

Tangohia te 36 i te 7, ka -29.

$$\left(-\frac{29}{4}-\frac{1}{2}\right)\left(-2\right)$$

Ko te maha noa iti rawa atu o 4 me 2 ko 4. Me tahuri -\frac{29}{4} me \frac{1}{2} ki te hautau me te tautūnga 4.

$$\left(-\frac{29}{4}-\frac{2}{4}\right)\left(-2\right)$$

Tā te mea he rite te tauraro o -\frac{29}{4} me \frac{2}{4}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{-29-2}{4}\left(-2\right)$$

Tangohia te 2 i te -29, ka -31.

$$-\frac{31}{4}\left(-2\right)$$

Tuhia te -\frac{31}{4}\left(-2\right) hei hautanga kotahi.

$$\frac{-31\left(-2\right)}{4}$$

Whakareatia te -31 ki te -2, ka 62.

$$\frac{62}{4}$$

Whakahekea te hautanga \frac{62}{4} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$\frac{31}{2}$$

Tauwehe

$$\frac{31}{2} = 15\frac{1}{2} = 15.5$$