Whakaoti i te 30+15-10/2*15-10-12*10

$$30 + \frac { 15 - 10 } { 2 \times 15 - 10 - 12 } \times 10$$

Aromātai

$$\frac{145}{4}=36.25$$

Ngā Upane Otinga

Tangohia te 10 i te 15, ka 5.

$$30+\frac{5}{2\times 15-10-12}\times 10$$

Whakareatia te 2 ki te 15, ka 30.

$$30+\frac{5}{30-10-12}\times 10$$

Tangohia te 10 i te 30, ka 20.

$$30+\frac{5}{20-12}\times 10$$

Tangohia te 12 i te 20, ka 8.

$$30+\frac{5}{8}\times 10$$

Tuhia te \frac{5}{8}\times 10 hei hautanga kotahi.

$$30+\frac{5\times 10}{8}$$

Whakareatia te 5 ki te 10, ka 50.

$$30+\frac{50}{8}$$

Whakahekea te hautanga \frac{50}{8} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$30+\frac{25}{4}$$

Me tahuri te 30 ki te hautau \frac{120}{4}.

$$\frac{120}{4}+\frac{25}{4}$$

Tā te mea he rite te tauraro o \frac{120}{4} me \frac{25}{4}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{120+25}{4}$$

Tāpirihia te 120 ki te 25, ka 145.

$$\frac{145}{4}$$

Tauwehe

$$\frac{5 \cdot 29}{2 ^ {2}} = 36\frac{1}{4} = 36.25$$