# 建立一个分数   下载 嵌入代码 关闭 插入一张图片，当点击这个图片时启动仿真程序。 回到HTML5 版本

• 分数
• 等值分数
• 带分数

### 示范 学习目标

• 用数字和图片建立相等的分数
• 用数字和图案比较分数
• 熟悉相同的简化之后的分数和没有化简的分数
• 注意：建立一个分数的方法在分数介绍和分数匹配程序里都有详细叙述或者可以用独立的工具。

### 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.2
Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.
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.

### 教师提交的活动

Equivalent Fractions Day 3 of 3 Meaghan Hixson K-5 指导 数学
Fractions 3 Day Unit Meaghan Hixson K-5 指导 数学
Working with Fractions Deborah Gaff K-5 实验室
SECUNDARIA: Alineación PhET con programas de la SEP México (2011 y 2017) Diana López 初中

PREPARATORIA: Alineación de PhET con programas de la DGB México (2017) Diana López 本科生

PRIMARIA: Alineación con programas de la SEP México (2011 y 2017) Diana López 初中
K-5

How do PhET simulations fit in my middle school program? Sarah Borenstein 初中 其它 生物学

MS and HS TEK to Sim Alignment Elyse Zimmer 高中

분수 만들기 SIM 사용설명서 이화국(Wha Kuk Lee) K-5 家庭作业

Kesirler - 3 Derslik Öğrenci Çalışması Sebnem Atabas (Translated from Fraction Unit Student Sheet by Meaghan Hixson) 初中 指导 数学
Building Fractions Nicole Scicutella 初中
K-5

Back to the Basics Nyetta Abernathy 初中

K-5

Teacher Michele Immediato K-5 实验室 数学
Building Fractions Jillian Gutman K-5

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