简便计算3.9×9.9
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 18:02:42
![简便计算3.9×9.9](/uploads/image/z/748137-57-7.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%973.9%C3%979.9)
简便计算3.9×9.9
简便计算3.9×9.9
简便计算3.9×9.9
3.9×9.9
= 3.9 × (10 - 0.1)
= 39 - 0.39
= 38.61
=(10-0.1)×3.9
=10×3.9-0.1×3.9
=39-0.39
=38.61
3.9×9.9
=3.9×(10-0.1)
=3.9×10-3.9×0.1
=39-0.39
=38.61
收录互联网各类作业题目,免费共享学生作业习题
作文号手机作业共收录了 千万级 学生作业题目
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 18:02:42
简便计算3.9×9.9
简便计算3.9×9.9
简便计算3.9×9.9
3.9×9.9
= 3.9 × (10 - 0.1)
= 39 - 0.39
= 38.61
=(10-0.1)×3.9
=10×3.9-0.1×3.9
=39-0.39
=38.61
3.9×9.9
=3.9×(10-0.1)
=3.9×10-3.9×0.1
=39-0.39
=38.61