Chrome，
QQ浏览器
关于此实验
主题
- 分数
- 等值分数
- 可约分数
- 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
- 预测和解释如何改变分数的分子来影响分数的值。
- 预测和解释如何改变分数的分母来影响分数的值。
- 在一个分数找、数字部分的一个图像和一个在数轴上点之间进行转换。
- 使用数字和图片出匹配的分数。
- 使用不同的数字使分数等值。
- 在不同的图像模式中匹配分数。
- 使用数字和图片匹配分数。
标准对齐
Common Core - Math
1.G.A.3
Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.
2.G.A.3
Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape.
3.G.A.2
Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.
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.2a
Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line.
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.
版本 1.0.12
