Whakaoti i te 0.4-(3/4-5/12)

$$0.4 - ( \frac { 3 } { 4 } - \frac { 5 } { 12 } )$$

Aromātai

$$\frac{1}{15}\approx 0.066666667$$

Ngā Upane Otinga

Ko te maha noa iti rawa atu o 4 me 12 ko 12. Me tahuri \frac{3}{4} me \frac{5}{12} ki te hautau me te tautūnga 12.

$$0.4-\left(\frac{9}{12}-\frac{5}{12}\right)$$

Tā te mea he rite te tauraro o \frac{9}{12} me \frac{5}{12}, me tango rāua mā te tango i ō raua taurunga.

$$0.4-\frac{9-5}{12}$$

Tangohia te 5 i te 9, ka 4.

$$0.4-\frac{4}{12}$$

Whakahekea te hautanga \frac{4}{12} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 4.

$$0.4-\frac{1}{3}$$

Me tahuri ki tau ā-ira 0.4 ki te hautau \frac{4}{10}. Whakahekea te hautanga \frac{4}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

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

Ko te maha noa iti rawa atu o 5 me 3 ko 15. Me tahuri \frac{2}{5} me \frac{1}{3} ki te hautau me te tautūnga 15.

$$\frac{6}{15}-\frac{5}{15}$$

Tā te mea he rite te tauraro o \frac{6}{15} me \frac{5}{15}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{6-5}{15}$$

Tangohia te 5 i te 6, ka 1.

$$\frac{1}{15}$$

Tauwehe

$$\frac{1}{3 \cdot 5} = 0.06666666666666667$$