Whakaoti i te 95*0.2+95*0.3+80*0.2+150*0.3

$$95 \times 0.2+95 \times 0.3+80 \times 0.2+150 \times 0.3$$

Aromātai

$$108.5$$

Ngā Upane Otinga

Whakareatia te 95 ki te 0.2, ka 19.

$$19+95\times 0.3+80\times 0.2+150\times 0.3$$

Whakareatia te 95 ki te 0.3, ka 28.5.

$$19+28.5+80\times 0.2+150\times 0.3$$

Tāpirihia te 19 ki te 28.5, ka 47.5.

$$47.5+80\times 0.2+150\times 0.3$$

Whakareatia te 80 ki te 0.2, ka 16.

$$47.5+16+150\times 0.3$$

Tāpirihia te 47.5 ki te 16, ka 63.5.

$$63.5+150\times 0.3$$

Whakareatia te 150 ki te 0.3, ka 45.

$$63.5+45$$

Tāpirihia te 63.5 ki te 45, ka 108.5.

$$108.5$$

Tauwehe

$$\frac{7 \cdot 31}{2} = 108\frac{1}{2} = 108.5$$