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数学简便运算,简便运算(脱式计算)41.2×8.1+11×1.25+53.7×1.9格式:41.2×8.1+11×1.2

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/16 19:44:22
数学简便运算,
简便运算(脱式计算)
41.2×8.1+11×1.25+53.7×1.9
格式:
41.2×8.1+11×1.25+53.7×1.9
=×××××
=×××××
=×××
41.2×8.1+11×1.25+53.7×1.9
=41.2×8.1+11×1.25+(41.2×8.1+12.5×1.9)
=(41.2×8.1+41.2×1.9)+(11×1.25+12.5×1.9)
=41.2×(8.1+1.9)+12.5×(1.1+1.9)
=412+37.5
=449.5