Whakaoti i te (5/10+2/10)-(5/10*1/10)

$$( \frac { 5 } { 10 } + \frac { 2 } { 10 } ) - ( \frac { 5 } { 10 } \times \frac { 1 } { 10 } )$$

Aromātai

$$\frac{13}{20}=0.65$$

Ngā Upane Otinga

Tā te mea he rite te tauraro o \frac{5}{10} me \frac{2}{10}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

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

Tāpirihia te 5 ki te 2, ka 7.

$$\frac{7}{10}-\frac{5}{10}\times \frac{1}{10}$$

Whakahekea te hautanga \frac{5}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.

$$\frac{7}{10}-\frac{1}{2}\times \frac{1}{10}$$

Me whakarea te \frac{1}{2} ki te \frac{1}{10} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{7}{10}-\frac{1\times 1}{2\times 10}$$

Mahia ngā whakarea i roto i te hautanga \frac{1\times 1}{2\times 10}.

$$\frac{7}{10}-\frac{1}{20}$$

Ko te maha noa iti rawa atu o 10 me 20 ko 20. Me tahuri \frac{7}{10} me \frac{1}{20} ki te hautau me te tautūnga 20.

$$\frac{14}{20}-\frac{1}{20}$$

Tā te mea he rite te tauraro o \frac{14}{20} me \frac{1}{20}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{14-1}{20}$$

Tangohia te 1 i te 14, ka 13.

$$\frac{13}{20}$$

Tauwehe

$$\frac{13}{2 ^ {2} \cdot 5} = 0.65$$