Whakaoti i te 71/2div1*2-{12*(1/3-0.3)-3/20}

$$7 \frac { 1 } { 2 } \div 1 \cdot 2 - \{ 12 \times ( \frac { 1 } { 3 } - 0.3 ) - \frac { 3 } { 20 } \}$$

Aromātai

$$14.75$$

Ngā Upane Otinga

Whakareatia te 7 ki te 2, ka 14.

$$\frac{\frac{14+1}{2}}{1}\times 2-\left(12\left(\frac{1}{3}-0.3\right)-\frac{3}{20}\right)$$

Tāpirihia te 14 ki te 1, ka 15.

$$\frac{\frac{15}{2}}{1}\times 2-\left(12\left(\frac{1}{3}-0.3\right)-\frac{3}{20}\right)$$

Ka whakawehea he tau ki te tahi, hua ai ko ia anō.

$$\frac{15}{2}\times 2-\left(12\left(\frac{1}{3}-0.3\right)-\frac{3}{20}\right)$$

Me whakakore te 2 me te 2.

$$15-\left(12\left(\frac{1}{3}-0.3\right)-\frac{3}{20}\right)$$

Me tahuri ki tau ā-ira 0.3 ki te hautau \frac{3}{10}.

$$15-\left(12\left(\frac{1}{3}-\frac{3}{10}\right)-\frac{3}{20}\right)$$

Ko te maha noa iti rawa atu o 3 me 10 ko 30. Me tahuri \frac{1}{3} me \frac{3}{10} ki te hautau me te tautūnga 30.

$$15-\left(12\left(\frac{10}{30}-\frac{9}{30}\right)-\frac{3}{20}\right)$$

Tā te mea he rite te tauraro o \frac{10}{30} me \frac{9}{30}, me tango rāua mā te tango i ō raua taurunga.

$$15-\left(12\times \frac{10-9}{30}-\frac{3}{20}\right)$$

Tangohia te 9 i te 10, ka 1.

$$15-\left(12\times \frac{1}{30}-\frac{3}{20}\right)$$

Whakareatia te 12 ki te \frac{1}{30}, ka \frac{12}{30}.

$$15-\left(\frac{12}{30}-\frac{3}{20}\right)$$

Whakahekea te hautanga \frac{12}{30} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 6.

$$15-\left(\frac{2}{5}-\frac{3}{20}\right)$$

Ko te maha noa iti rawa atu o 5 me 20 ko 20. Me tahuri \frac{2}{5} me \frac{3}{20} ki te hautau me te tautūnga 20.

$$15-\left(\frac{8}{20}-\frac{3}{20}\right)$$

Tā te mea he rite te tauraro o \frac{8}{20} me \frac{3}{20}, me tango rāua mā te tango i ō raua taurunga.

$$15-\frac{8-3}{20}$$

Tangohia te 3 i te 8, ka 5.

$$15-\frac{5}{20}$$

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

$$15-\frac{1}{4}$$

Me tahuri te 15 ki te hautau \frac{60}{4}.

$$\frac{60}{4}-\frac{1}{4}$$

Tā te mea he rite te tauraro o \frac{60}{4} me \frac{1}{4}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{60-1}{4}$$

Tangohia te 1 i te 60, ka 59.

$$\frac{59}{4}$$

Tauwehe

$$\frac{59}{2 ^ {2}} = 14\frac{3}{4} = 14.75$$