Whakaoti i te (.2)75+.2(78)+.2(76)+(.2)(81)+.2(84)

$$(.2)75+.2(78)+.2(76)+(.2)(81)+.2(84)$$

Aromātai

$$78.8$$

Ngā Upane Otinga

Whakareatia te 0.2 ki te 75, ka 15.

$$15+0.2\times 78+0.2\times 76+0.2\times 81+0.2\times 84$$

Whakareatia te 0.2 ki te 78, ka 15.6.

$$15+15.6+0.2\times 76+0.2\times 81+0.2\times 84$$

Tāpirihia te 15 ki te 15.6, ka 30.6.

$$30.6+0.2\times 76+0.2\times 81+0.2\times 84$$

Whakareatia te 0.2 ki te 76, ka 15.2.

$$30.6+15.2+0.2\times 81+0.2\times 84$$

Tāpirihia te 30.6 ki te 15.2, ka 45.8.

$$45.8+0.2\times 81+0.2\times 84$$

Whakareatia te 0.2 ki te 81, ka 16.2.

$$45.8+16.2+0.2\times 84$$

Tāpirihia te 45.8 ki te 16.2, ka 62.

$$62+0.2\times 84$$

Whakareatia te 0.2 ki te 84, ka 16.8.

$$62+16.8$$

Tāpirihia te 62 ki te 16.8, ka 78.8.

$$78.8$$

Tauwehe

$$\frac{2 \cdot 197}{5} = 78\frac{4}{5} = 78.8$$