@AdDien90
ingat ni,
complement of 10:
1 & 9
2 & 8
3 & 7
4 & 6
5 & 5
42-19 for example,
right hand side, digit 2-9= 3 (sebab complement 9 is 1, so 1 +2 = 3)
left hand side, sebab dah pinjam 1, so tinggal 3-1 = 2
jadilah 23.
Korang paham ke tak??!
Homework maths jgn malas buat.