=(( 135 * ( 25 + 15 ) : 10
= ( 135 * 30 ) : 10
= 5400 : 10
= 540
(135 * 25+135*15)/10
=(135*(25+15))/10
=(135*40)/10
=135*4
=540
={135 .(25+15)} : 10
=(135 .40) :10
=5400 :10
=540
( 135 x 25 + 135 x 15 ) : 10 = 135 x ( 25 + 15) : 10
= 135 x 40 : 10
= 5400 : 10
= 540
(135 x 25 + 135 x 15) : 10
= 135 x (25+15) : 10
= 135 x 40 : 10
= 5400 : 10
= 540