Whakaoti i te 1200*31/4/100

$$1200 \times \frac { 3 \frac { 1 } { 4 } } { 100 }$$

Aromātai

$$39$$

Ngā Upane Otinga

Tuhia te \frac{\frac{3\times 4+1}{4}}{100} hei hautanga kotahi.

$$1200\times \frac{3\times 4+1}{4\times 100}$$

Whakareatia te 3 ki te 4, ka 12.

$$1200\times \frac{12+1}{4\times 100}$$

Tāpirihia te 12 ki te 1, ka 13.

$$1200\times \frac{13}{4\times 100}$$

Whakareatia te 4 ki te 100, ka 400.

$$1200\times \frac{13}{400}$$

Tuhia te 1200\times \frac{13}{400} hei hautanga kotahi.

$$\frac{1200\times 13}{400}$$

Whakareatia te 1200 ki te 13, ka 15600.

$$\frac{15600}{400}$$

Whakawehea te 15600 ki te 400, kia riro ko 39.

$$39$$

Tauwehe

$$3\times 13$$