Question

用简便方法计算 19.98×37-199.8×1.9+1998×0.82

Answer 1

19.98×37-199.8×1.9+1998×0.82
=19.98× 37-19.98×19+19.98×82
=19.98×（37-19+82）
=19.98×100
=1998