Whakaoti i te 2/5-1/2+1/5-3/2=

$$\frac{ 2 }{ 5 } - \frac{ 1 }{ 2 } + \frac{ 1 }{ 5 } - \frac{ 3 }{ 2 } =$$

Aromātai

$$-\frac{7}{5}=-1.4$$

Ngā Upane Otinga

Ko te maha noa iti rawa atu o 5 me 2 ko 10. Me tahuri \frac{2}{5} me \frac{1}{2} ki te hautau me te tautūnga 10.

$$\frac{4}{10}-\frac{5}{10}+\frac{1}{5}-\frac{3}{2}$$

Tā te mea he rite te tauraro o \frac{4}{10} me \frac{5}{10}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{4-5}{10}+\frac{1}{5}-\frac{3}{2}$$

Tangohia te 5 i te 4, ka -1.

$$-\frac{1}{10}+\frac{1}{5}-\frac{3}{2}$$

Ko te maha noa iti rawa atu o 10 me 5 ko 10. Me tahuri -\frac{1}{10} me \frac{1}{5} ki te hautau me te tautūnga 10.

$$-\frac{1}{10}+\frac{2}{10}-\frac{3}{2}$$

Tā te mea he rite te tauraro o -\frac{1}{10} me \frac{2}{10}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{-1+2}{10}-\frac{3}{2}$$

Tāpirihia te -1 ki te 2, ka 1.

$$\frac{1}{10}-\frac{3}{2}$$

Ko te maha noa iti rawa atu o 10 me 2 ko 10. Me tahuri \frac{1}{10} me \frac{3}{2} ki te hautau me te tautūnga 10.

$$\frac{1}{10}-\frac{15}{10}$$

Tā te mea he rite te tauraro o \frac{1}{10} me \frac{15}{10}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{1-15}{10}$$

Tangohia te 15 i te 1, ka -14.

$$\frac{-14}{10}$$

Whakahekea te hautanga \frac{-14}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$-\frac{7}{5}$$

Tauwehe

$$-\frac{7}{5} = -1\frac{2}{5} = -1.4$$