Absolute Subtraction Mistake
Algebra
Level
2
Lazy Liz doesn't like absolute values notation, and often drops them from her equations. She always writes
\[ |a-b| = a-b. \]
How many of the \( 11 \times 11 \) ordered pairs of integers \( (a, b) \), each of which are between 0 and 10 inclusive, are there, such that
\[ |a-b| = a-b? \]
by
Calvin Lin