Whakaoti i te (1/8+2/5)*(5/2div1/4)

$$( \frac{ 1 }{ 8 } + \frac{ 2 }{ 5 } ) \times ( \frac{ 5 }{ 2 } \div \frac{ 1 }{ 4 } )$$

Aromātai

$$\frac{21}{4}=5.25$$

Ngā Upane Otinga

Ko te maha noa iti rawa atu o 8 me 5 ko 40. Me tahuri \frac{1}{8} me \frac{2}{5} ki te hautau me te tautūnga 40.

$$\left(\frac{5}{40}+\frac{16}{40}\right)\times \frac{\frac{5}{2}}{\frac{1}{4}}$$

Tā te mea he rite te tauraro o \frac{5}{40} me \frac{16}{40}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{5+16}{40}\times \frac{\frac{5}{2}}{\frac{1}{4}}$$

Tāpirihia te 5 ki te 16, ka 21.

$$\frac{21}{40}\times \frac{\frac{5}{2}}{\frac{1}{4}}$$

Whakawehe \frac{5}{2} ki te \frac{1}{4} mā te whakarea \frac{5}{2} ki te tau huripoki o \frac{1}{4}.

$$\frac{21}{40}\times \frac{5}{2}\times 4$$

Tuhia te \frac{5}{2}\times 4 hei hautanga kotahi.

$$\frac{21}{40}\times \frac{5\times 4}{2}$$

Whakareatia te 5 ki te 4, ka 20.

$$\frac{21}{40}\times \frac{20}{2}$$

Whakawehea te 20 ki te 2, kia riro ko 10.

$$\frac{21}{40}\times 10$$

Tuhia te \frac{21}{40}\times 10 hei hautanga kotahi.

$$\frac{21\times 10}{40}$$

Whakareatia te 21 ki te 10, ka 210.

$$\frac{210}{40}$$

Whakahekea te hautanga \frac{210}{40} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.

$$\frac{21}{4}$$

Tauwehe

$$\frac{3 \cdot 7}{2 ^ {2}} = 5\frac{1}{4} = 5.25$$