WhakamĀrama Āpitihanga
E 35 ngā poro-tahi. E whakaaturia ana ngā rōpū e toru o te tekau:
E taea ana ngā rōpū o te tekau te whakawhiti hei poro-tekau. Arā:
He rautaki matua tēnei i roto i ngā paheko tau, arā, ko te whakawhiti i waenga i ngā paparanga uara tū. Arā pea, he whakawhiti i ngā kotahi hei tekau, he whakawhiti rānei i ngā tekau hei rau.
Exchanging is an important strategy in number operations, that is, exchanging between hierarchies of place values. For example, exchanging ones for a ten, or tens for a hundred.
Tekau ngā poro-tahi, nō reira me whakawhiti hei poro-tekau.
67 + 29. Whakawhitia he kotahi mai i te 67 ki te 29. Ināianei, he ngāwari te whakatutuki i te tāpiritanga 66 + 30. Arā, ko te 96.
Whakawhitia he rau hei tekau.