# Expression Exchange_代數的表示法

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### 標題

• Equivalent Expressions
• Evaluating Expressions
• Simplifying Expressions

### 學習目標

• Simplify expressions by combining like-terms
• Contextualize coefficients and like/unlike-terms
• Interpret an expression in both abstract and concrete representations
• Build an expression that is equivalent to a target

### 標準對齊

#### 共用核心 - 數學

3.OA.A.1
Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 × 7.
5.OA.A.1
Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols.
6.EE.A.2
Write, read, and evaluate expressions in which letters stand for numbers.
6.EE.A.2b
Identify parts of an expression using mathematical terms (sum, term, product, factor, quotient, coefficient); view one or more parts of an expression as a single entity. For example, describe the expression 2 (8 + 7) as a product of two factors; view (8 + 7) as both a single entity and a sum of two terms.
6.EE.A.3
Apply the properties of operations to generate equivalent expressions. For example, apply the distributive property to the expression 3 (2 + x) to produce the equivalent expression 6 + 3x; apply the distributive property to the expression 24x + 18y to produce the equivalent expression 6 (4x + 3y); apply properties of operations to y + y + y to produce the equivalent expression 3y.
6.EE.A.4
Identify when two expressions are equivalent (i.e., when the two expressions name the same number regardless of which value is substituted into them). For example, the expressions y + y + y and 3y are equivalent because they name the same number regardless of which number y stands for..

### 教學提示

 模擬教學的控制概觀、模型簡化與引導學生思考 ( PDF ).

### 老師提供的活動

Comparando expresiones equivalentes Pam Branner, traducción de Diana López 高中

Games Remote Lesson ideas Trish Loeblein K-5

Remote

Adding and Subtracting Expressions Amanda McGarry 國中 指引 數學
Algebraic Expressions Amanda McGarry 國中 指引 數學
Generating Equivalent Expressions Amanda McGarry 國中 指引 數學
Equivalent Expression Exploration Kimberly Struck 國中 指引 數學
Like Terms and How to Combine Them Julie Carres 國中 指引 數學
Comparing Equivalent Expressions Pam Brenner 國中

SECUNDARIA: Alineación PhET con programas de la SEP México (2011 y 2017) Diana López 高中

PREPARATORIA: Alineación de PhET con programas de la DGB México (2017) Diana López 大學-簡介

Middle School Math Sim Alignment Amanda McGarry 國中 其它 數學
Adierazpen baliokideak alderatzea José Manuel López Irastorza 高中 指引 數學
Modelo de Áreas, Cambio de Expresiones Andrés Gualberto Palomo Cuevas 高中 Remote

Continuación de Cambio de Expresiones Andrés Gualberto Palomo Cuevas 高中 其它

Cambio de Expresiones Andrés Gualberto Palomo Cuevas 高中 Remote

Variables and Coefficients Lisa Nitzsche 國中
K-5

Adding Negations Julie Carres 國中 指引 數學

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