Whakaoti i te 2/7-1/2*4/14-(1/2-frac{3}{4})=

$$\frac { 2 } { 7 } - \frac { 1 } { 2 } \cdot \frac { 4 } { 14 } - ( \frac { 1 } { 2 } - \frac { 3 } { 4 } ) =$$

Aromātai

$$\frac{11}{28}\approx 0.392857143$$

Ngā Upane Otinga

Whakahekea te hautanga \frac{4}{14} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$\frac{2}{7}-\frac{1}{2}\times \frac{2}{7}-\left(\frac{1}{2}-\frac{3}{4}\right)$$

Me whakarea te \frac{1}{2} ki te \frac{2}{7} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{2}{7}-\frac{1\times 2}{2\times 7}-\left(\frac{1}{2}-\frac{3}{4}\right)$$

Me whakakore tahi te 2 i te taurunga me te tauraro.

$$\frac{2}{7}-\frac{1}{7}-\left(\frac{1}{2}-\frac{3}{4}\right)$$

Tā te mea he rite te tauraro o \frac{2}{7} me \frac{1}{7}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{2-1}{7}-\left(\frac{1}{2}-\frac{3}{4}\right)$$

Tangohia te 1 i te 2, ka 1.

$$\frac{1}{7}-\left(\frac{1}{2}-\frac{3}{4}\right)$$

Ko te maha noa iti rawa atu o 2 me 4 ko 4. Me tahuri \frac{1}{2} me \frac{3}{4} ki te hautau me te tautūnga 4.

$$\frac{1}{7}-\left(\frac{2}{4}-\frac{3}{4}\right)$$

Tā te mea he rite te tauraro o \frac{2}{4} me \frac{3}{4}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{1}{7}-\frac{2-3}{4}$$

Tangohia te 3 i te 2, ka -1.

$$\frac{1}{7}-\left(-\frac{1}{4}\right)$$

Ko te tauaro o -\frac{1}{4} ko \frac{1}{4}.

$$\frac{1}{7}+\frac{1}{4}$$

Ko te maha noa iti rawa atu o 7 me 4 ko 28. Me tahuri \frac{1}{7} me \frac{1}{4} ki te hautau me te tautūnga 28.

$$\frac{4}{28}+\frac{7}{28}$$

Tā te mea he rite te tauraro o \frac{4}{28} me \frac{7}{28}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{4+7}{28}$$

Tāpirihia te 4 ki te 7, ka 11.

$$\frac{11}{28}$$

Tauwehe

$$\frac{11}{2 ^ {2} \cdot 7} = 0.39285714285714285$$