Whakaoti i te 624div(-100)*[(-2/5)+1/4]

$$624 \div ( - 100 ) \times [ ( - \frac { 2 } { 5 } ) + \frac { 1 } { 4 } ]$$

Aromātai

$$\frac{117}{125}=0.936$$

Ngā Upane Otinga

Whakahekea te hautanga \frac{624}{-100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 4.

$$-\frac{156}{25}\left(-\frac{2}{5}+\frac{1}{4}\right)$$

Ko te maha noa iti rawa atu o 5 me 4 ko 20. Me tahuri -\frac{2}{5} me \frac{1}{4} ki te hautau me te tautūnga 20.

$$-\frac{156}{25}\left(-\frac{8}{20}+\frac{5}{20}\right)$$

Tā te mea he rite te tauraro o -\frac{8}{20} me \frac{5}{20}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$-\frac{156}{25}\times \frac{-8+5}{20}$$

Tāpirihia te -8 ki te 5, ka -3.

$$-\frac{156}{25}\left(-\frac{3}{20}\right)$$

Me whakarea te -\frac{156}{25} ki te -\frac{3}{20} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{-156\left(-3\right)}{25\times 20}$$

Mahia ngā whakarea i roto i te hautanga \frac{-156\left(-3\right)}{25\times 20}.

$$\frac{468}{500}$$

Whakahekea te hautanga \frac{468}{500} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 4.

$$\frac{117}{125}$$

Tauwehe

$$\frac{3 ^ {2} \cdot 13}{5 ^ {3}} = 0.936$$