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Find the product using suitable properties: (a) 738 x 103 (b) 854 x 102 (c) 258 x 1008 (d) 1005 x 168
Answer: You can use the distributive law to find the product of a given number of sets.
The distributive law states that
“If you multiply a coefficient by the sum/addition of two terms, it is imperative that you multiply each of the two numbers by the coefficient and finally perform the addition operation.”
This property can be symbolically represented as. :
A (B+C) = AB + BC
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
