Whakaoti i te 25div50*11/2*21/5

$$25 \div 50 \times 1 \frac { 1 } { 2 } \times 2 \frac { 1 } { 5 }$$

Aromātai

$$\frac{33}{20}=1.65$$

Ngā Upane Otinga

Whakahekea te hautanga \frac{25}{50} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 25.

$$\frac{1}{2}\times \frac{1\times 2+1}{2}\times \frac{2\times 5+1}{5}$$

Whakareatia te 1 ki te 2, ka 2.

$$\frac{1}{2}\times \frac{2+1}{2}\times \frac{2\times 5+1}{5}$$

Tāpirihia te 2 ki te 1, ka 3.

$$\frac{1}{2}\times \frac{3}{2}\times \frac{2\times 5+1}{5}$$

Me whakarea te \frac{1}{2} ki te \frac{3}{2} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{1\times 3}{2\times 2}\times \frac{2\times 5+1}{5}$$

Mahia ngā whakarea i roto i te hautanga \frac{1\times 3}{2\times 2}.

$$\frac{3}{4}\times \frac{2\times 5+1}{5}$$

Whakareatia te 2 ki te 5, ka 10.

$$\frac{3}{4}\times \frac{10+1}{5}$$

Tāpirihia te 10 ki te 1, ka 11.

$$\frac{3}{4}\times \frac{11}{5}$$

Me whakarea te \frac{3}{4} ki te \frac{11}{5} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{3\times 11}{4\times 5}$$

Mahia ngā whakarea i roto i te hautanga \frac{3\times 11}{4\times 5}.

$$\frac{33}{20}$$

Tauwehe

$$\frac{3 \cdot 11}{2 ^ {2} \cdot 5} = 1\frac{13}{20} = 1.65$$