Question

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

Answer 1

Heya ! ☺

⚜Here's your answer :

☀Property : To write a number by splitting in two parts such that one part becomes a multiple of 10 .

(a) 738 × 103

= 738 × (100 +3)

= 738 × 100 + 738 × 3

= 73800 + 2214

= 76014 Ans.

(b) 854 × 102

= 854 × (100 +2)

= 854 × 100 + 854 × 2

= 85400 +1708

=87108 Ans.

(c) 258 × 1008

= 258 × (1000 +8)

= 258 × 1000 + 258 × 8

= 258000 + 2064

= 260064 Ans.

(d) 1005 × 168

= (1000 + 5) × 168

= 1000 × 168 + 5 × 168

= 168000 +840

=168840 Ans.

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Thank you ! ♠

Doubts are most welcome :)