Whakaoti i te 0.12*{1-(-2/3)^2}

$$0.12 \times \{ 1 - ( - \frac { 2 } { 3 } ) ^ { 2 } \}$$

Aromātai

$$\frac{1}{15}\approx 0.066666667$$

Ngā Upane Otinga

Tātaihia te -\frac{2}{3} mā te pū o 2, kia riro ko \frac{4}{9}.

$$0.12\left(1-\frac{4}{9}\right)$$

Me tahuri te 1 ki te hautau \frac{9}{9}.

$$0.12\left(\frac{9}{9}-\frac{4}{9}\right)$$

Tā te mea he rite te tauraro o \frac{9}{9} me \frac{4}{9}, me tango rāua mā te tango i ō raua taurunga.

$$0.12\times \frac{9-4}{9}$$

Tangohia te 4 i te 9, ka 5.

$$0.12\times \frac{5}{9}$$

Me tahuri ki tau ā-ira 0.12 ki te hautau \frac{12}{100}. Whakahekea te hautanga \frac{12}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 4.

$$\frac{3}{25}\times \frac{5}{9}$$

Me whakarea te \frac{3}{25} ki te \frac{5}{9} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{3\times 5}{25\times 9}$$

Mahia ngā whakarea i roto i te hautanga \frac{3\times 5}{25\times 9}.

$$\frac{15}{225}$$

Whakahekea te hautanga \frac{15}{225} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 15.

$$\frac{1}{15}$$

Tauwehe

$$\frac{1}{3 \cdot 5} = 0.06666666666666667$$