示例3：铅笔与索引卡数量分析

GeoGebra 命令及参数

1. LaTeX(steps) → counter
2. LaTeX("\text{Use the buttons below to return to the original problem or}\cr\text{randomly generate a similar practice problem.}") → RandomizationText
3. Corner(1) → A
4. Corner(3) → B
5. LaTeX((((("\text{Index cards are represented by the variable }\textcolor{#000099}{c}\text{, and she bought }\textcolor{#000099}{" * cards) * "}\text{ packs of index}\cr\text{cards. The term representing the number of packs she purchased is }\textcolor{#000099}{") * cards) * "c}.")) → text3
6. LaTeX((((("\text{Nia had a coupon for }\textcolor{#000099}{\$" * discount) * "}\text{ off her total purchase. The coupon represents a discount,}\cr\text{or subtraction, from the amount she has to pay. This can be represented by }\textcolor{#000099}{–") * discount) * "}.")) → text4
7. LaTeX("\text{Identify the term(s) in the expression.}") → text6
8. LaTeX("\text{Identify the coefficient(s) in the expression. }") → text8
9. LaTeX("\text{Identify the constant term(s) in the expression, if any.}") → text10
10. LaTeX((((((("\textcolor{#000099}{" * pencils) * "}\text{ packs of pencils; }\textcolor{#000099}{") * cards) * "}\text{ packs of index cards; a }\textcolor{#000099}{\$") * discount) * "}\text{ discount}")) → Problem
11. LaTeX((((((("\text{Combining the terms, the expression that represents Nia’s purchase is \textcolor{#000099}{" * pencils) * "p+") * cards) * "c –") * discount) * "}.")) → text5
12. LaTeX((((((((((((("\text{The expression representing Nia’s purchase is }\textcolor{#000099}{" * pencils) * "p + ") * cards) * "c – ") * discount) * "}\text{. Terms can be a number,}\cr\text{a variable, or the product of a number and variable(s). }\cr\text{The terms are }\textcolor{#000099}{") * pencils) * "p}\text{, }\textcolor{#000099}{") * cards) * "c}\text{, and }\textcolor{#000099}{–") * discount) * "}.")) → text7
13. LaTeX((((((((((("\text{A coefficient is a number multiplied by a variable in an algebraic expression. }\cr\text{In the expression }\textcolor{#000099}{" * pencils) * "p + ") * cards) * "c – ") * discount) * "}\text{, the coefficients are }\textcolor{#000099}{") * pencils) * "}\text{ and }\textcolor{#000099}{") * cards) * "}.")) → text9
14. LaTeX((((((((("\text{A constant is a quantity that does not change. }\cr\text{In the expression }\textcolor{#000099}{" * pencils) * "p + ") * cards) * "c – ") * discount) * "}\text{, the constant is }\textcolor{#000099}{–") * discount) * "}.")) → text11
15. LaTeX("\text{Move the slider to solve the problem.}") → text0