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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

15-\frac{10}{4}
Whakareatia te 10 ki te \frac{1}{4}, ka \frac{10}{4}.
15-\frac{5}{2}
Whakahekea te hautanga \frac{10}{4} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.
\frac{30}{2}-\frac{5}{2}
Me tahuri te 15 ki te hautau \frac{30}{2}.
\frac{30-5}{2}
Tā te mea he rite te tauraro o \frac{30}{2} me \frac{5}{2}, me tango rāua mā te tango i ō raua taurunga.
\frac{25}{2}
Tangohia te 5 i te 30, ka 25.