Whakaoti i te 9/2-20/1+15/1

$$\frac{ 9 }{ 2 } - \frac{ 20 }{ 1 } + \frac{ 15 }{ 1 }$$

Aromātai

$$-\frac{1}{2}=-0.5$$

Ngā Upane Otinga

Ka whakawehea he tau ki te tahi, hua ai ko ia anō.

$$\frac{9}{2}-20+\frac{15}{1}$$

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

$$\frac{9}{2}-\frac{40}{2}+\frac{15}{1}$$

Tā te mea he rite te tauraro o \frac{9}{2} me \frac{40}{2}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{9-40}{2}+\frac{15}{1}$$

Tangohia te 40 i te 9, ka -31.

$$-\frac{31}{2}+\frac{15}{1}$$

Ka whakawehea he tau ki te tahi, hua ai ko ia anō.

$$-\frac{31}{2}+15$$

Me tahuri te 15 ki te hautau \frac{30}{2}.

$$-\frac{31}{2}+\frac{30}{2}$$

Tā te mea he rite te tauraro o -\frac{31}{2} me \frac{30}{2}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{-31+30}{2}$$

Tāpirihia te -31 ki te 30, ka -1.

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

Tauwehe

$$-\frac{1}{2} = -0.5$$