Mō ia paheko tau, arā anō ētahi paheko e noho whanaunga mai ana. Ina whakaemia ēnei paheko whanaunga, e kīia ana he whānau meka matua. Hei tauira, mō te 3 + 4 = 7, koia nei te katoa o te whānau meka matua: 3 + 4 = 7; 4 + 3 = 7; 7 - 3 = 4;7 - 4 = 3 (TRP 2010:331). / For each number operation there are other operations which are related. Together they are called a family of facts. For example, 3 + 4 = 7; 4 + 3 = 7; 7 - 3 = 4;7 - 4 = 3 is a family of facts (TRP 2010:331).

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