235×12.1+235×42.2-135×54.3 (简便算法)
问题描述:
235×12.1+235×42.2-135×54.3 (简便算法)
答
235×12.1+235×42.2-135×54.3
=235×(12.1+42.2)-135×54.3
=235×54.3-135×54.3
=(235-135)×54.3
=100×54.3
=5430