Question

Find the product by suitable rearrangement. 

i) 25 × 1963 × 4 

ii) 20 × 255 × 50 × 6

Answer 1

i) 25 × 1963 × 4 = 25 × (1963 × 4) 

= 25 × (4 × 1963) (Commutative property) 

= (25 × 4) × 1963 (Associative property) 

= 100 × 1963 

= 196300

ii) 20 × 255 × 50 × 6 = 20 × 50 × 255 × 6 (Commutative property) 

= (20 × 50) × (255 × 6) (Associative property) 

= 1000 × 1530 

= 15,30,000