Whakaoti i te 4-9/39*21/6

$$4- \frac{ 9 }{ 39 } \times 2 \frac { 1 } { 6 }$$

Aromātai

$$\frac{7}{2}=3.5$$

Ngā Upane Otinga

Whakahekea te hautanga \frac{9}{39} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 3.

$$4-\frac{3}{13}\times \frac{2\times 6+1}{6}$$

Whakareatia te 2 ki te 6, ka 12.

$$4-\frac{3}{13}\times \frac{12+1}{6}$$

Tāpirihia te 12 ki te 1, ka 13.

$$4-\frac{3}{13}\times \frac{13}{6}$$

Me whakarea te \frac{3}{13} ki te \frac{13}{6} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$4-\frac{3\times 13}{13\times 6}$$

Me whakakore tahi te 13 i te taurunga me te tauraro.

$$4-\frac{3}{6}$$

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

$$4-\frac{1}{2}$$

Me tahuri te 4 ki te hautau \frac{8}{2}.

$$\frac{8}{2}-\frac{1}{2}$$

Tā te mea he rite te tauraro o \frac{8}{2} me \frac{1}{2}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{8-1}{2}$$

Tangohia te 1 i te 8, ka 7.

$$\frac{7}{2}$$

Tauwehe

$$\frac{7}{2} = 3\frac{1}{2} = 3.5$$