用简便方法计算55²x5-45²x5

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/27 05:31:26
用简便方法计算55²x5-45²x5
x){>eu O6mS_[|tSS5eCs S]8&Hv6$ojgQ`[ (XLIHTD%†@ $ف2Y

用简便方法计算55²x5-45²x5
用简便方法计算55²x5-45²x5

用简便方法计算55²x5-45²x5
55^2x5-45^2x5
=5x(55^2-45^2)
=5x(55+45)x(55-45)
=5x100x10
=5000