5th math
posted by mia .
Nia scored 21 points in the game. If she scored 13 points in the first half of the game, how many points did she score in the second half?
I subtract 21 from 13 and got 7?
To check my work I added 13+7 and got 20?

21  13 is 8, and not seven.
13 + 8 = 21!