NA2-1: Use simple additive strategies with whole numbers and fractions.

Elaboration on this Achievement Objective

This means students will learn to treat whole numbers as units of ones that can be split and recombined to make calculations easier. Additive strategies are about a type of thinking not the operation of addition. So additive strategies can be applied to addition (for example, 47 + 38 is 50 + 40 – 5), subtraction (for example, 74 – 8 = box. as 74 – 4 – 4 = box. ), multiplication (for example, 4 x 4 = box. as 4 + 4 + 4 + 4 = box. , which is 8 + 8 = box. ), division (for example, 18 ÷ 3 = box. , as 5 + 5 + 5 = 15 so 6 + 6 + 6 = 18). Additive strategies may also be applied to finding fractions of sets particularly halves, thirds, quarters, fifths, eighths and tenths. Level Two corresponds to students being proficient at the Early Additive stage of the number framework.