Chrome，
QQ浏览器
关于此实验
主题
- 分数
- 等值分数
- 带分数
- 数轴
描述
如果你想吃三分之一个巧克力蛋糕或者半杯水，在这个过程中你其实已经用到了分数。通过创建有趣的互动对象，给出你自己的分数。在游戏中匹配几何形状与分数值，赚取小星星！挑战不同的难度级别，看你能得到多少颗星星。
示范 学习目标
- Predict and explain how changing the numerator of a fraction affects the fraction's value
- Predict and explain how changing the denominator of a fraction affects the fraction's value
- Convert between a picture of a fraction, an improper fraction, and a mixed number
- Build matching fractions using numbers and pictures
标准对齐
Common Core - Math
3.NF.A.1
Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.
3.NF.A.2
Understand a fraction as a number on the number line; represent fractions on a number line diagram.
3.NF.A.2b
Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.
5.NF.B.3
Interpret a fraction as division of the numerator by the denominator (a/b = a ÷ b). Solve word problems involving division of whole numbers leading to answers in the form of fractions or mixed numbers, e.g., by using visual fraction models or equations to represent the problem. For example, interpret 3/4 as the result of dividing 3 by 4, noting that 3/4 multiplied by 4 equals 3, and that when 3 wholes are shared equally among 4 people each person has a share of size 3/4. If 9 people want to share a 50-pound sack of rice equally by weight, how many pounds of rice should each person get? Between what two whole numbers does your answer lie?
版本 1.0.12
