求6.25×7×8,2.05×6.53-2.05×0.33的简便计算.
来源:学生作业学帮网 编辑:学帮网 时间:2024/06/26 03:40:43
求6.25×7×8,2.05×6.53-2.05×0.33的简便计算.
解
6.25×7×8
=6.25×4×2×7
=25×2×7
=350
2.05×6.53-2.05×0.33
=2.05×(6.53-0.33)
=2.05×6.2
=2.05×(6+0.2)
=2.05×6+2.05×0.2
=12.3+0.41
=12.71
收录互联网各类作业题目,免费共享学生作业习题
慧海网手机作业共收录了 千万级 学生作业题目
来源:学生作业学帮网 编辑:学帮网 时间:2024/06/26 03:40:43
求6.25×7×8,2.05×6.53-2.05×0.33的简便计算.
解
6.25×7×8
=6.25×4×2×7
=25×2×7
=350
2.05×6.53-2.05×0.33
=2.05×(6.53-0.33)
=2.05×6.2
=2.05×(6+0.2)
=2.05×6+2.05×0.2
=12.3+0.41
=12.71