(1000-77779)-90000

To solve the expression \( (1000 - 77779) - 90000 \), we first calculate the expression inside the parentheses:

1. Calculate \( 1000 - 77779 \): \[ 1000 - 77779 = -76779 \]

2. Now, substitute back into the expression: \[ -76779 - 90000 \]

3. Perform the subtraction: \[ -76779 - 90000 = -166779 \]

So, \( (1000 - 77779) - 90000 = -166779 \).