Respuesta :
59+28=87. because
59+
28
--------
9 +8=17 so you keep the 7 and put the 1 on top of the 2=5
2+5= 7 7+1= 8, so your final answer would be 87
59+
28
--------
9 +8=17 so you keep the 7 and put the 1 on top of the 2=5
2+5= 7 7+1= 8, so your final answer would be 87