Estimate the following product using general rule:
345X46

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Solution

$s t e p - 1 : R o u n d o f f e a c h n u m b e r t o i t s g r e a t e s t p l a c e : 345 i s e s t i m a t e d t o i t s n e a r e s t h u n d r e d \Rightarrow 300 46 i s e s t i m a t e d t o i t s n e a r e s t t e n \Rightarrow 50 s t e p - 2 : f i n d t h e p r o d u c t \Rightarrow 300 X 50 = 15000 H e n c e, t h e e s t i m a t e d p r o d u c t = 15000$

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