1) 75*56+25*56
=( 75*50+6)
= 75*50
= 3750
= 75*6
= 450
=3750+ 450
= 4200
(25*50+6)
= 25*50
= 1250
= 25*6
=150
1250 + 150
= 1400
4200+1400
= 5600
2) 135*50+6
= 135*50
=6750
135*6
= 810
6750+810
=7560
135*40+4
= 135*40
= 5400
135* 4
= 540
5400+540
= 5940
7560+5940
=13500
HOPE U UNDERSTOOD