Question

4. Find the product using suitable properties.
(a) 738 x 103 (b) 854 x 102 (c) 258 x 1008 (d) 1005 x 168
ay. The​

Answer 1

Answer:

(a) 738 × 103

= 738 × (100 + 3)

= 738 × 100 + 738 × 3

= 73800 + 2214

= 76014

(b) 854 × 102

= 854 × (100 + 2)

= 854 × 100 + 854 × 2

= 85400 + 1708

= 87108

(c) 258 × 1008

= 258 × (1000 + 8)

= 258 × 1000 + 258 × 8

= 258000 + 2064

= 260064

(d) 1005 × 168

= (1000 + 5) × 168

= 1000 × 168 + 5 × 168

= 168000 + 840

= 168840

Answer 2

Answer:

• (a) 738 × 103
• = 738 × (100 + 3)
• = 738 × 100 + 738 × 3
• = 73800 + 2214
• = 76014

• (b) 854 × 102
• = 854 × (100 + 2)
• = 854 × 100 + 854 × 2
• = 85400 + 1708
• = 87108

• (c) 258 × 1008
• = 258 × (1000 + 8)
• = 258 × 1000 + 258 × 8
• = 258000 + 2064
• = 260064

• (d) 1005 × 168
• = (1000 + 5) × 168
• = 1000 × 168 + 5 × 168
• = 168000 + 840
• = 168840