Whakaoti i te 121/3*102/4

$$12 \frac { 1 } { 3 } \times 10 \frac { 2 } { 4 }$$

Aromātai

$$\frac{259}{2}=129.5$$

Ngā Upane Otinga

Whakareatia te 12 ki te 3, ka 36.

$$\frac{36+1}{3}\times \frac{10\times 4+2}{4}$$

Tāpirihia te 36 ki te 1, ka 37.

$$\frac{37}{3}\times \frac{10\times 4+2}{4}$$

Whakareatia te 10 ki te 4, ka 40.

$$\frac{37}{3}\times \frac{40+2}{4}$$

Tāpirihia te 40 ki te 2, ka 42.

$$\frac{37}{3}\times \frac{42}{4}$$

Whakahekea te hautanga \frac{42}{4} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$\frac{37}{3}\times \frac{21}{2}$$

Me whakarea te \frac{37}{3} ki te \frac{21}{2} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{37\times 21}{3\times 2}$$

Mahia ngā whakarea i roto i te hautanga \frac{37\times 21}{3\times 2}.

$$\frac{777}{6}$$

Whakahekea te hautanga \frac{777}{6} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 3.

$$\frac{259}{2}$$

Tauwehe

$$\frac{7 \cdot 37}{2} = 129\frac{1}{2} = 129.5$$