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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

\frac{21}{28}-\frac{4}{28}
Ko te maha noa iti rawa atu o 4 me 7 ko 28. Me tahuri \frac{3}{4} me \frac{1}{7} ki te hautau me te tautūnga 28.
\frac{21-4}{28}
Tā te mea he rite te tauraro o \frac{21}{28} me \frac{4}{28}, me tango rāua mā te tango i ō raua taurunga.
\frac{17}{28}
Tangohia te 4 i te 21, ka 17.