Respuesta :
add units digit first
5+4 = 9
carry = 0.
add tens digit with carry
2+1+0 = 3
hence the sum is 39
5+4 = 9
carry = 0.
add tens digit with carry
2+1+0 = 3
hence the sum is 39
[tex]25+14 = 20+5+10+4 =20+10+5+4 = 30+9 = 39[/tex]