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Tohaina

\frac{12+3}{4}\times \frac{2\times 5+2}{5}
Whakareatia te 3 ki te 4, ka 12.
\frac{15}{4}\times \frac{2\times 5+2}{5}
Tāpirihia te 12 ki te 3, ka 15.
\frac{15}{4}\times \frac{10+2}{5}
Whakareatia te 2 ki te 5, ka 10.
\frac{15}{4}\times \frac{12}{5}
Tāpirihia te 10 ki te 2, ka 12.
\frac{15\times 12}{4\times 5}
Me whakarea te \frac{15}{4} ki te \frac{12}{5} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.
\frac{180}{20}
Mahia ngā whakarea i roto i te hautanga \frac{15\times 12}{4\times 5}.
9
Whakawehea te 180 ki te 20, kia riro ko 9.