Chrome，
QQ浏览器
关于此实验
主题
- 比率
- 比例推理
- Unit Rate
描述
从设计项链，扔气球，打台球买苹果中学习比例和正比的数学概念。通过正比预测数字。
示范 学习目标
- Use a ratio as a descriptive characteristic
- Compare the meaning of a ratio in different contexts
- Use scaling to build proportions or find a missing value in a proportion
- Simplify ratios to build proportions or find a missing value in a proportion
- Use multiplicative reasoning to solve problems
标准对齐
Common Core - Math
5.NF.B.4a
Interpret the product (a/b) × q as a parts of a partition of q into b equal parts; equivalently, as the result of a sequence of operations a × q ÷ b. For example, use a visual fraction model to show (2/3) × 4 = 8/3, and create a story context for this equation. Do the same with (2/3) × (4/5) = 8/15. (In general, (a/b) × (c/d) = ac/bd.)
6.RP.A.1
Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities. For example, "The ratio of wings to beaks in the bird house at the zoo was 2:1, because for every 2 wings there was 1 beak." "For every vote candidate A received, candidate C received nearly three votes."
6.RP.A.3
Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.
7.RP.A.2a
Decide whether two quantities are in a proportional relationship, e.g., by testing for equivalent ratios in a table or graphing on a coordinate plane and observing whether the graph is a straight line through the origin.
版本 1.0.15
