Whakaoti i te -1/3*(10-2^2)-15*1/2=

$$- \frac { 1 } { 3 } \cdot ( 10 - 2 ^ { 2 } ) - 15 \cdot \frac { 1 } { 2 } =$$

Aromātai

$$-\frac{19}{2}=-9.5$$

Ngā Upane Otinga

Tātaihia te 2 mā te pū o 2, kia riro ko 4.

$$-\frac{1}{3}\left(10-4\right)-15\times \frac{1}{2}$$

Tangohia te 4 i te 10, ka 6.

$$-\frac{1}{3}\times 6-15\times \frac{1}{2}$$

Tuhia te -\frac{1}{3}\times 6 hei hautanga kotahi.

$$\frac{-6}{3}-15\times \frac{1}{2}$$

Whakawehea te -6 ki te 3, kia riro ko -2.

$$-2-15\times \frac{1}{2}$$

Whakareatia te 15 ki te \frac{1}{2}, ka \frac{15}{2}.

$$-2-\frac{15}{2}$$

Me tahuri te -2 ki te hautau -\frac{4}{2}.

$$-\frac{4}{2}-\frac{15}{2}$$

Tā te mea he rite te tauraro o -\frac{4}{2} me \frac{15}{2}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{-4-15}{2}$$

Tangohia te 15 i te -4, ka -19.

$$-\frac{19}{2}$$

Tauwehe

$$-\frac{19}{2} = -9\frac{1}{2} = -9.5$$