Whakaoti i te (0.23:2-0.05):0.4-1=

$$( 0.23 : 2 - 0.05 ) : 0.4 - 1 =$$

Aromātai

$$-0.8375$$

Ngā Upane Otinga

Whakarohaina te \frac{0.23}{2} mā te whakarea i te taurunga me te tauraro ki te 100.

$$\frac{\frac{23}{200}-0.05}{0.4}-1$$

Me tahuri ki tau ā-ira 0.05 ki te hautau \frac{5}{100}. Whakahekea te hautanga \frac{5}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.

$$\frac{\frac{23}{200}-\frac{1}{20}}{0.4}-1$$

Ko te maha noa iti rawa atu o 200 me 20 ko 200. Me tahuri \frac{23}{200} me \frac{1}{20} ki te hautau me te tautūnga 200.

$$\frac{\frac{23}{200}-\frac{10}{200}}{0.4}-1$$

Tā te mea he rite te tauraro o \frac{23}{200} me \frac{10}{200}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{\frac{23-10}{200}}{0.4}-1$$

Tangohia te 10 i te 23, ka 13.

$$\frac{\frac{13}{200}}{0.4}-1$$

Tuhia te \frac{\frac{13}{200}}{0.4} hei hautanga kotahi.

$$\frac{13}{200\times 0.4}-1$$

Whakareatia te 200 ki te 0.4, ka 80.

$$\frac{13}{80}-1$$

Me tahuri te 1 ki te hautau \frac{80}{80}.

$$\frac{13}{80}-\frac{80}{80}$$

Tā te mea he rite te tauraro o \frac{13}{80} me \frac{80}{80}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{13-80}{80}$$

Tangohia te 80 i te 13, ka -67.

$$-\frac{67}{80}$$

Tauwehe

$$-0.8375$$