If you're seeing this message, it means we're having trouble loading external resources on our website.

如果你被网页过滤器挡住,请确保域名*.kastatic.org*.kasandbox.org 没有被阻止.

主要内容

单元 6:变量和表达式

1,800 个可获得的掌握积分

关于本单元

A variable is a symbol that represents a value, often one that changes, like how long you've been awake. Learn ways that we can change an expression's value (such as by changing the values of its variables) or keep the value the same (such as with the distributive property).
升级上述技能,积攒 560 掌握点
升级上述技能,积攒 240 掌握点

练习

升级上述技能,积攒 640 掌握点
接下来为您推荐:

单元测试

升级本单元里的所有技能,积攒高达 1800 掌握点!