Whakaoti i te 20-2/3:4/3

$$20 - \frac { 2 } { 3 } : \frac { 4 } { 3 }$$

Aromātai

$$\frac{39}{2}=19.5$$

Ngā Upane Otinga

Whakawehe \frac{2}{3} ki te \frac{4}{3} mā te whakarea \frac{2}{3} ki te tau huripoki o \frac{4}{3}.

$$20-\frac{2}{3}\times \frac{3}{4}$$

Me whakarea te \frac{2}{3} ki te \frac{3}{4} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$20-\frac{2\times 3}{3\times 4}$$

Me whakakore tahi te 3 i te taurunga me te tauraro.

$$20-\frac{2}{4}$$

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

$$20-\frac{1}{2}$$

Me tahuri te 20 ki te hautau \frac{40}{2}.

$$\frac{40}{2}-\frac{1}{2}$$

Tā te mea he rite te tauraro o \frac{40}{2} me \frac{1}{2}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{40-1}{2}$$

Tangohia te 1 i te 40, ka 39.

$$\frac{39}{2}$$

Tauwehe

$$\frac{3 \cdot 13}{2} = 19\frac{1}{2} = 19.5$$