邮票购买情境的分步代数表达式交互演示

GeoGebra 命令及参数

1. LaTeX("\text{Write an expression with parentheses that represents the value of all the stamps Easton has left.}") → text3
2. LaTeX("\text{We need to find the total value of all of Easton’s remaining stamps, so add these two expressions:}") → text8
3. LaTeX("\text{Easton has left.}") → text11
4. LaTeX("\text{Distribute as needed.}") → text13
5. LaTeX("\text{Original expression}") → text17
6. LaTeX("\text{Rewritten expression}") → text23
7. LaTeX("\text{Combine like terms.}") → text29
8. LaTeX("\text{Rearrange to group like terms.}") → text33
9. LaTeX("\text{Expression from the previous step}") → text34
10. SelectedElement(NOS1) → st1
11. SelectedElement(NOS2) → st2
12. SelectedElement(ROS1) → sr1
13. SelectedElement(ROS2) → sr2
14. LaTeX((((("\text{Multiply \textcolor{#000099}{" * st1) * "} by \textcolor{#000099}{") * sr1) * "}, and}")) → text19
15. LaTeX((("\text{multiply \textcolor{#000099}{\textendash\;f} by \textcolor{#000099}{" * sr1) * "}.}")) → text20
16. LaTeX((((((((("\text{\textcolor{#000099}{= " * stsr1) * "\;\textendash\; ") * sr1) * "f + \mathbf{") * stsr2) * "\; \textendash\; ") * sr2) * "p}} }")) → text24
17. LaTeX((((("\text{Multiply \textcolor{#000099}{" * st2) * "} by \textcolor{#000099}{") * sr2) * "}, and}")) → text25
18. LaTeX((("\text{multiply \textcolor{#000099}{\textendash\;p} by \textcolor{#000099}{" * sr2) * "}.}")) → text26
19. LaTeX((((((((((((("\text{In the expression \textcolor{#000099}{" * stsr1) * " \;\textendash\; ") * sr1) * "f + ") * stsr2) * "\; \textendash\; ") * sr2) * "p}, the terms \textcolor{#000099}{") * stsr1) * "} and \textcolor{#000099}{") * stsr2) * "} are like terms.}")) → text30
20. LaTeX((((((((("\text{\textcolor{#000099}{" * stsr1) * "\;\textendash\; ") * sr1) * "f + ") * stsr2) * "\; \textendash\; ") * sr2) * "p} }")) → text31
21. LaTeX((((((((("\text{\textcolor{#000099}{= " * stsr1) * "\;+ ") * stsr2) * "\;\textendash\; ") * sr1) * "f \; \textendash\; ") * sr2) * "p} }")) → text32
22. LaTeX((((((("\text{\textcolor{#000099}{=" * stsr12) * "\; \textendash\;") * sr1) * "f \; \textendash\; ") * sr2) * "p }}")) → text35
23. LaTeX((((("\text{Add \textcolor{#000099}{" * stsr1) * "} and \textcolor{#000099}{") * stsr2) * "}.}")) → text36
24. SelectedIndex(NOS1) → Nos_1
25. SelectedIndex(NOS2) → Nos_2
26. SelectedIndex(ROS1) → Ros_1
27. SelectedIndex(ROS2) → Ros_2
28. LaTeX((((((("\text{A simplified expression for the total value in cents of the stamps Easton has left is \textcolor{#000099}{" * stsr12) * "\; \textendash\;") * sr1) * "f \; \textendash\; ") * sr2) * "p }.}")) → text37
29. LaTeX((((("\text{\textcolor{#000099}{" * sr1) * "(") * st1) * "\; \textendash\; f)}}")) → text5
30. LaTeX((((("\text{\textcolor{#000099}{" * sr2) * "(") * st2) * "\; \textendash\; p)}}")) → text7
31. LaTeX((((((((("\text{The expression \textcolor{#000099}{" * sr1) * "(") * st1) * "\; \textendash\; f)} \textcolor{#000099}{+} \textcolor{#000099}{") * sr2) * "(") * st2) * "\;\textendash\; p)} represents the total value in cents of the stamps}")) → text10
32. LaTeX((((((((("\text{The expression \textcolor{#000099}{" * sr1) * "(") * st1) * "\; \textendash\; f)} \textcolor{#000099}{+} \textcolor{#000099}{") * sr2) * "(") * st2) * "\;\textendash\; p)} contains two sets of parentheses where distribution can be applied.}")) → text14
33. LaTeX((((((((("\text{\textcolor{#000099}{" * sr1) * "(") * st1) * "\; \textendash\; f)} \textcolor{#000099}{+} \textcolor{#000099}{") * sr2) * "(") * st2) * "\; \textendash\; p)}}")) → text16
34. LaTeX("\text{-cent}") → text2_2
35. LaTeX("\text{-cent}") → text2_3
36. LaTeX((((((((("\text{\textcolor{#000099}{\mathbf{= " * stsr1) * "\; \textendash\; ") * sr1) * "f} + ") * sr2) * "(") * st2) * " \;\textendash\;p)} }")) → text18
37. LaTeX((((((((("\text{\textcolor{#000099}{" * stsr1) * " \;\textendash\; ") * sr1) * "f + ") * sr2) * "(") * st2) * "\; \textendash\; p)} }")) → text22
38. LaTeX((((("\text{Next, distribute \textcolor{#000099}{" * sr2) * "} to \textcolor{#000099}{") * st2) * "} and \textendash\textcolor{#000099}{p}.}")) → text21
39. LaTeX((((((((("\text{\textcolor{#000099}{" * sr1) * "(") * st1) * "\;\textendash\; f)} \textcolor{#000099}{+} \textcolor{#000099}{") * sr2) * "(") * st2) * "\; \textendash\; p)}}")) → text9
40. LaTeX((((((((((((((((("\text{Once distributed, the expression \textcolor{#000099}{" * sr1) * "(") * st1) * "\; \textendash\; f)} \textcolor{#000099}{+} \textcolor{#000099}{") * sr2) * "(") * st2) * "\; \textendash\; p)\;}is \textcolor{#000099}{") * stsr1) * "\;\textendash\; ") * sr1) * "f + ") * stsr2) * "\; \textendash\; ") * sr2) * "p.}}")) → text27
41. LaTeX((((("\text{First, distribute \textcolor{#000099}{" * sr1) * "} to \textcolor{#000099}{") * st1) * "} and \;\textcolor{#000099}{\textendash\;f}.}")) → text15
42. LaTeX((((("\text{\textcolor{#000099}{" * sr1) * "}-cent stamps: Easton bought \textcolor{#000099}{") * st1) * "} and used \textcolor{#000099}{f} of them.")) → text1
43. LaTeX((((("\text{ \textcolor{#000099}{" * sr2) * "}-cent stamps: Easton bought \textcolor{#000099}{") * st2) * "} and used \textcolor{#000099}{p} of them.}")) → text40
44. LaTeX("\text{quantities that are not equivalent}") → text38
45. LaTeX("\text{quantities are equal}") → text28
46. LaTeX("\text{individual}") → text2_4
47. LaTeX("\text{stamps}") → text39
48. LaTeX("\text{individual}") → text2_5
49. LaTeX("\text{stamps}") → text39_1
50. LaTeX((((("\text{Easton had \textcolor{#000099}{" * st1) * "} individual \textcolor{#000099}{") * sr1) * "}-cent stamps and used \textcolor{#000099}{f} of them. This is represented as:}")) → text4
51. LaTeX((((("\text{Easton had \textcolor{#000099}{" * st2) * "} individual \textcolor{#000099}{") * sr2) * "}-cent stamps and used \textcolor{#000099}{p} of them. This is represented as:}")) → text6
52. LaTeX("\text{\mathbf{equation} a mathematical sentence that uses an equal sign (=) to show that two}") → text42
53. LaTeX("\text{\mathbf{inequality} a mathematical sentence that shows the relationship between }") → text49