2 ms·It's equal in Scheme. You need to use rationals. Also, under 'Unix Calc': (0.1 + 0.2) - 0.3 yields 0.by anthk 3y agoIt's equal in Scheme. You need to use rationals. Also, under 'Unix Calc': (0.1 + 0.2) - 0.3 yields 0.