99点9x0点28减0点666x37简便

Question

如题所述

Answer 1

99.9×0.28-0.666×37
=33.3×3×0.28-33.3×0.02×37
=33.3×0.84-33.3×0.74
=33.3×(0.84-0.74)
=33.3×0.1
=3.33