巧算“12.34*56.78+876.6*5.678”

来源：学生作业学帮网 编辑：学帮网 时间：2024/05/24 04:29:03

巧算“12.34*56.78+876.6*5.678”

12.34*56.78+876.6*5.678
=5.678*(123.4+876.6)
=5.678*1000
=5678

12.34*56.78+876.6*5.678
=12.34*56.78+87.66*56.78
=(12.34+87.66)*56.78
=100*56.78
=5678