please answer by step by step
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Step-by-step explanation:
(i) =567×(285+115)
=567×400
=226800(Ans.)
(ii)=385×(178-78)
=385×100
=38500(Ans.)
(iii)=645×(365+135)
=645×500
=322500(Ans.)
(iv)=168×(407-307)
=168×100
=16800(Ans.)
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