Ko te whiriwhiri i te tapeke ina honoa ētahi rōpū ōrite, arā, he whakapoto i te tāpiritanga tāruarua o aua rōpū. Hei tauira, ko te tapeke o ngā rōpū e 3 o te 4:
4 + 4 + 4 = 4 × 3 = 12. Ko te whakareatanga tētahi o ngā pakeho tau matua.
Finding the total when a number of equal groups are joined, as in a shortened form of repeated addition. For example, the total of 3 groups of 4: 4 + 4 + 4 = 4 × 3 = 12. Multiplication is one of the main number operations.