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  1. Perform several multiplications to evaluate expressions
    by Dr. Osama M. Khaled — published May 02, 2026 — last modified May 05, 2026 08:05 AM — filed under: Year 8
    To evaluate expressions that contain several multiplications,we make repeated use of the rules for multiplying two integers.
    Located in Mathematics / … / Integers / Multiplying Integers
  2. Application problems with unknowns
    by Dr. Osama M. Khaled — published Dec 02, 2023 — last modified Jul 12, 2024 10:17 PM — filed under: Year 8
    Solve application problems to find one unknown
    Located in Mathematics / Algebra / Equations to Solve Application Problems
  3. Find the circumference of a circle
    by Dr. Osama M. Khaled — published May 17, 2026 — last modified May 17, 2026 03:53 AM — filed under: Year 8
    Since early history, mathematicians have known that the ratio of the distance around a circle (the circumference) divided by the length of its diameter is ...
    Located in Mathematics / Geometry / Circles
  4. Find the area of a circle
    by Dr. Osama M. Khaled — published May 17, 2026 — last modified May 17, 2026 07:57 PM — filed under: Year 8
    The area of a circle represents the total two-dimensional space enclosed within its curved boundary
    Located in Mathematics / Geometry / Circles
  5. Use similar triangles to find unknown lengths in application problems
    by Dr. Osama M. Khaled — published May 14, 2026 — last modified May 16, 2026 08:34 AM — filed under: Year 7, Year 8
    Similar triangles and proportions can be used to find lengths that would normally be difficult to measure.
    Located in Mathematics / Geometry / Congruent Triangles and Similar Triangles
  6. Use the division property of equality
    by Dr. Osama M. Khaled — published Nov 04, 2023 — last modified Jul 12, 2024 10:15 PM — filed under: Year 8
    Dividing both sides of an equation by the same nonzero number does not change its solution.
    Located in Mathematics / Algebra / Solving Equations with Equality
  7. Multiply two integers that have different signs
    by Dr. Osama M. Khaled — published Apr 29, 2026 — last modified Apr 29, 2026 08:57 PM — filed under: Year 8
    To multiply a positive integer and a negative integer,multiply their absolute values.Then make the final answer negative.
    Located in Mathematics / … / Integers / Multiplying Integers
  8. Find the percent of increase or decrease
    by Dr. Osama M. Khaled — published Dec 24, 2024 — last modified May 12, 2025 06:16 AM — filed under: Year 7, Year 8, Year 9
    Percents can be used to describe how a quantity has changed
    Located in Mathematics / … / Percent / Applications of Percent
  9. Algebraic Notations and Symbolic Structures
    by Dr. Osama M. Khaled — published May 23, 2026 — last modified May 23, 2026 08:36 AM — filed under: Year 7, Year 8, Year 9, Year 10
    Induction, Notation, Expressions, and Identities
    Located in Mathematics / Calculus / From Arithmetic to Algebra
  10. Mathematical Operations and Foundational Constraints
    by Dr. Osama M. Khaled — published May 23, 2026 — last modified May 23, 2026 08:55 AM — filed under: Year 7, Year 8
    Negative Numbers and Division by Zero
    Located in Mathematics / Calculus / From Arithmetic to Algebra
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