Jawabanmu

2014-08-21T14:55:33+07:00
A x (b + c) = (a x b) + (a x c)
contoh :
6 x (4 + 3) = (6 x 4) + (6 x 3) = 24 + 18 = 42
7 x (2 + 4) = (7 x 2) + (7 x 4) = 14 + 28 = 42
2014-08-21T14:58:30+07:00
= 20 + ( 7 x 5 )
= ( 20 x 7 ) + ( 20 x 5 )
= 240