400 - 190 = 210
400 - 398 = 2
1382 - 400 = 982
400 - 125 = 275
The question above would be written as 950--400 and when you have a minus and a minus together they make a positive, so the actual question is 950+400 which equals 1350.
-30 - (-24) = -30 + 24 = -6
841 minus 441 is 400.
-30 minus -6 is -24
30 minus 11 is 19.
2,013 minus 30 is 1,983.
4 minus 30 is -26.
pi x diameter of the turn + 2 x length of the straightaway = 400 metersSince the track is measured 30 cm into the lane from the curb or 20 cm from a painted line, the 400 would actually be replaced by 400 minus (pi x 2 x either 20 or 30 cm)