一次方程式
3x + 5 = 20 のような方程式を八つの単元で学びます。解とは何か、等式の四つの性質、両辺に変数がある方程式、解き方の手順、分数や小数を含む方程式、そして公式です。グラフラボでは方程式の両辺をそれぞれ直線として描くので、直線が交わる点に解が見えます。
進み具合
このコースの出典 (5)
- OpenStax, Elementary Algebra 2e , chapter 2: 2.1 Solve Equations Using the Subtraction and Addition Properties of Equality (openstax.org/books/elementary-algebra-2e/pages/2-1-solve-equations-using-the-subtraction-and-addition-properties-of-equality)
- 2.2 Division and Multiplication Properties, 2.3 Variables and Constants on Both Sides, 2.4 Use a General Strategy to Solve Linear Equations (conditional equation, identity, contradiction: .../pages/2-4-use-a-general-strategy-to-solve-linear-equations)
- 2.5 Fractions or Decimals, 2.6 Solve a Formula for a Specific Variable
- 4.5 Fahrenheit and Celsius F = 9/5 C + 32 (.../pages/4-5-use-the-slope-intercept-form-of-an-equation-of-a-line)
- MacTutor, University of St Andrews: "Earliest Uses of Symbols of Relation" (Recorde, The Whetstone of Witte, 1557: mathshistory.st-andrews.ac.uk/Miller/mathsym/relation) and the al-Khwarizmi biography (Hisab al-jabr w'al-muqabala, al-jabr = completion: mathshistory.st-andrews.ac.uk/Biographies/Al-Khwarizmi)
確認日: 2026-10-17