The numbers just don't add up. In this scene, what does "The numbers just don't add up." mean? A: There's only so much love to go around. B: We could share. A: The numbers just don't add up. There's not enough love for the two of us. I know 'add up' means 'make sense', but I don't know why he said THE NUMBERS don't add up, not IT doesn't add up. Why? Thank you!