20 minute Activity 1.7 The associative property 1. Do the calculations: Columns A ematics Grade a) (5 + 9) + I c) 43+ (7 +55) e) 25 x (4 x 8) g) (117 +25) + 75 i) 50 × (2 x 9) Column B b) 5+ (9 + 1) d) (43+7)+55 Was Column A or Column B faster to calculate? The associative property can be used to make calculations easier. i) iii) f) (25 × 4) × 8 h) 117 +(25 + 75) j) (50 × 2) × 9 2. a) Which property of addition is shown in this calculation? (5+12) +6=5+(12+6) Spot On Mathematics Grade 7 b) Which of these is an example of the associative property? 3x0=0 ii) 12-3=3x3 (21 × 3) x 2 = 21 × (3x× 2)​