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  1. Density
    by Dr. Osama M. Khaled — published Jul 25, 2024 — last modified Aug 11, 2024 02:26 AM — filed under: Year 7, Year 8
    Solids differ in many ways, including color, texture, and elasticity. Another important distinguishing property of solids is density
    Located in Physics / Solids
  2. Determine whether a number is a solution
    by Dr. Osama M. Khaled — published Sep 11, 2023 — last modified Jul 12, 2024 10:14 PM — filed under: Year 8
    An equation is a statement indicating that two expressions are equal
    Located in Mathematics / Algebra / Solving Equations with Equality
  3. Distributive Property
    by Dr. Osama M. Khaled — published May 28, 2023 — last modified Jul 12, 2024 10:06 PM — filed under: Year 8, Year 9
    Distributive property is often used to simplify algebraic expressions.
    Located in Mathematics / Algebra / Simplifying Algebraic Expressions
  4. Divide two integers
    by Dr. Osama M. Khaled — published May 05, 2026 — last modified May 05, 2026 10:44 AM — filed under: Year 8
    To divide two integers,divide their absolute values
    Located in Mathematics / … / Integers / Dividing Integers
  5. Divide two integers (vocabulary)
    by Dr. Osama M. Khaled — published May 05, 2026 — last modified May 07, 2026 07:36 PM — filed under: Year 8
    Learn the mathematical definitions describing the division of two integers
    Located in Mathematics / … / Integers / Dividing Integers
  6. Estimate answers to percent problems involving 1% and 10%
    by Dr. Osama M. Khaled — published Mar 22, 2025 — last modified May 12, 2025 06:13 AM — filed under: Year 6, Year 7, Year 8
    There is an easy way to find 1% of a number that does not require any calculations
    Located in Mathematics / … / Percent / Estimation with Percent
  7. Estimate answers to percent problems involving 50%, 25%, and 15%
    by Dr. Osama M. Khaled — published Mar 30, 2025 — last modified May 12, 2025 06:12 AM — filed under: Year 6, Year 7, Year 8
    To find 50% of a number, divide the number 2
    Located in Mathematics / … / Percent / Estimation with Percent
  8. Estimate Answers to percent problems involving 200%
    by Dr. Osama M. Khaled — published May 12, 2025 — last modified May 12, 2025 06:40 AM — filed under: Year 7, Year 8, Year 9
    Since 100% of a number is the number itself, it follows that 200% of a number would be twice the number.
    Located in Mathematics / … / Percent / Estimation with Percent
  9. Estimate the value of an expression
    by Dr. Osama M. Khaled — published May 08, 2026 — last modified May 09, 2026 04:26 AM — filed under: Year 8
    When an exact answer is not necessary and a quick approximation will do,we can use estimation.
    Located in Mathematics / … / Integers / Order of Operations and Estimation
  10. Evaluate exponential expressions that have negative bases
    by Dr. Osama M. Khaled — published May 04, 2026 — last modified May 05, 2026 08:06 AM — filed under: Year 8
    We evaluate exponential expressions with bases that are negative numbers.
    Located in Mathematics / … / Integers / Multiplying Integers
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