Whakaoti i te 90*78/100+30*90/100

$$90 \times \frac{ 78 }{ 100 } +30 \times \frac{ 90 }{ 100 }$$

Aromātai

$$\frac{486}{5}=97.2$$

Ngā Upane Otinga

Whakahekea te hautanga \frac{78}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$90\times \frac{39}{50}+30\times \frac{90}{100}$$

Tuhia te 90\times \frac{39}{50} hei hautanga kotahi.

$$\frac{90\times 39}{50}+30\times \frac{90}{100}$$

Whakareatia te 90 ki te 39, ka 3510.

$$\frac{3510}{50}+30\times \frac{90}{100}$$

Whakahekea te hautanga \frac{3510}{50} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.

$$\frac{351}{5}+30\times \frac{90}{100}$$

Whakahekea te hautanga \frac{90}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.

$$\frac{351}{5}+30\times \frac{9}{10}$$

Tuhia te 30\times \frac{9}{10} hei hautanga kotahi.

$$\frac{351}{5}+\frac{30\times 9}{10}$$

Whakareatia te 30 ki te 9, ka 270.

$$\frac{351}{5}+\frac{270}{10}$$

Whakawehea te 270 ki te 10, kia riro ko 27.

$$\frac{351}{5}+27$$

Me tahuri te 27 ki te hautau \frac{135}{5}.

$$\frac{351}{5}+\frac{135}{5}$$

Tā te mea he rite te tauraro o \frac{351}{5} me \frac{135}{5}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{351+135}{5}$$

Tāpirihia te 351 ki te 135, ka 486.

$$\frac{486}{5}$$

Tauwehe

$$\frac{2 \cdot 3 ^ {5}}{5} = 97\frac{1}{5} = 97.2$$