9除以1.5加9除以4.5怎么算简便?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/05 06:27:50
9除以1.5加9除以4.5怎么算简便?
![9除以1.5加9除以4.5怎么算简便?](/uploads/image/z/7245706-58-6.jpg?t=9%E9%99%A4%E4%BB%A51.5%E5%8A%A09%E9%99%A4%E4%BB%A54.5%E6%80%8E%E4%B9%88%E7%AE%97%E7%AE%80%E4%BE%BF%3F)
9÷1.5 + 9÷4.5
= (9×2)÷(1.5×2) + (9×2)÷(4.5×2)
= 9×2÷3 + 9×2÷9
= 9÷3 ×2+ 9÷9×2
= 3 ×2+ 1×2
= 6 + 2
= 8
= (9×2)÷(1.5×2) + (9×2)÷(4.5×2)
= 9×2÷3 + 9×2÷9
= 9÷3 ×2+ 9÷9×2
= 3 ×2+ 1×2
= 6 + 2
= 8