Whakaoti i te (5*(5/2)+2*4)*20

$$(5 \times ( \frac{ 5 }{ 2 } )+2 \times 4) \times 20$$

Aromātai

$$410$$

Ngā Upane Otinga

Tuhia te 5\times \frac{5}{2} hei hautanga kotahi.

$$\left(\frac{5\times 5}{2}+2\times 4\right)\times 20$$

Whakareatia te 5 ki te 5, ka 25.

$$\left(\frac{25}{2}+2\times 4\right)\times 20$$

Whakareatia te 2 ki te 4, ka 8.

$$\left(\frac{25}{2}+8\right)\times 20$$

Me tahuri te 8 ki te hautau \frac{16}{2}.

$$\left(\frac{25}{2}+\frac{16}{2}\right)\times 20$$

Tā te mea he rite te tauraro o \frac{25}{2} me \frac{16}{2}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{25+16}{2}\times 20$$

Tāpirihia te 25 ki te 16, ka 41.

$$\frac{41}{2}\times 20$$

Tuhia te \frac{41}{2}\times 20 hei hautanga kotahi.

$$\frac{41\times 20}{2}$$

Whakareatia te 41 ki te 20, ka 820.

$$\frac{820}{2}$$

Whakawehea te 820 ki te 2, kia riro ko 410.

$$410$$

Tauwehe

$$2\times 5\times 41$$