Ratsionaalarvud

II. Hulk ja selle osahulk.

1) Milliseid naturaalarvude hulga osahulki oskad nimetada (vähemalt neli)?

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2) Too välja 4 erinevat paarisarvude hulga osahulka.

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3) Nimeta algarvude hulga osahulki.

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4) Nimeta vähemalt üks hulk, millele on algarvude hulk osahulgaks.

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5) Nimeta kõigi puude hulga osahulki.

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6) Kas ka tühihulk on kõigi maailmas kasvavate puude hulga osahulk?  ...................

7) Nimeta kõigi kolmnurkade hulga osahulki.

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8) Nimeta kõigi Eesti koolide hulga osahulki.

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9) Nimeta hulki, mille osahulgaks on kõigi Võrumaal kasvavate kuuskede hulk.

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