Resource 4: Use of S-cards and G-cards

Table R4.1 Use of S-cards and G-cards.

S-card (specialising) G-card (generalising) Generalisation is always true (A), sometimes true (S) or false (F)
(3 × 2) – 1 = (3 + 2) The predecessor of the product of two numbers is the sum of the two numbers  
(3 × 2) × 4 = 3 × (2 × 4) The product of three numbers remains the same if the product of any two of the numbers is multiplied by the third number  
12 ÷ 3 = (12 ÷ 4) + 1 ab/b = ab/a + (a – b)  

Resource 3: Examples of S-cards and G-cards

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