Whakaoti i te 9/10-(2/5+1/4)=

$$\frac { 9 } { 10 } - ( \frac { 2 } { 5 } + \frac { 1 } { 4 } ) =$$

Aromātai

$$\frac{1}{4}=0.25$$

Ngā Upane Otinga

Ko te maha noa iti rawa atu o 5 me 4 ko 20. Me tahuri \frac{2}{5} me \frac{1}{4} ki te hautau me te tautūnga 20.

$$\frac{9}{10}-\left(\frac{8}{20}+\frac{5}{20}\right)$$

Tā te mea he rite te tauraro o \frac{8}{20} me \frac{5}{20}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{9}{10}-\frac{8+5}{20}$$

Tāpirihia te 8 ki te 5, ka 13.

$$\frac{9}{10}-\frac{13}{20}$$

Ko te maha noa iti rawa atu o 10 me 20 ko 20. Me tahuri \frac{9}{10} me \frac{13}{20} ki te hautau me te tautūnga 20.

$$\frac{18}{20}-\frac{13}{20}$$

Tā te mea he rite te tauraro o \frac{18}{20} me \frac{13}{20}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{18-13}{20}$$

Tangohia te 13 i te 18, ka 5.

$$\frac{5}{20}$$

Whakahekea te hautanga \frac{5}{20} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.

$$\frac{1}{4}$$

Tauwehe

$$\frac{1}{2 ^ {2}} = 0.25$$