add up
US /æd ˈʌp/
UK /æd ˈʌp/

1.
cuadrar, tener sentido
to make sense; to seem reasonable or logical
:
•
His story just doesn't add up.
Su historia simplemente no cuadra.
•
The numbers don't add up, there must be a mistake.
Los números no cuadran, debe haber un error.