777 - 248 = 529
It is: 248 minus 48 = 200
500 minus 279 is 221.
500 minus 315 equals 185.
Half of 7000 is 3500 minus 500=3000.
252 + x = 500 x = 500 - 252 x = 248
248 - 1 = 281474976710655
8000-500=7500.
500 - 441 = 59
1147 - 500 = 647
500 - 199 = 301
500 - 150 = 350