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  1. Calculate commissions and commission rates
    by Dr. Osama M. Khaled — published Dec 13, 2024 — last modified May 12, 2025 06:14 AM — filed under: Year 7, Year 8, Year 9
    Instead of working for a salary or getting paid at an hourly rate,many salespeople are paid on commission.They earn a certain percent of the total dollar ...
    Located in Mathematics / … / Percent / Applications of Percent
  2. Calculate the amount of discount the sale price, and the discount rate
    by Dr. Osama M. Khaled — published Feb 21, 2025 — last modified May 12, 2025 06:19 AM — filed under: Year 6, Year 7, Year 8
    Learn the vocabulary of discount sales to be a smart shopper
    Located in Mathematics / … / Percent / Applications of Percent
  3. Calculations
    by Dr. Osama M. Khaled — published Apr 01, 2024 — last modified Jul 13, 2024 12:53 PM — filed under: Year 7
    The law of gravity included a symbol for proportionality. In order to use this relationship for solving problems, we must remove the proportionality by ...
    Located in Physics / Gravity
  4. Classification and Subsets of Numbers
    by Dr. Osama M. Khaled — published May 23, 2026 — last modified May 23, 2026 12:40 AM — filed under: Year 7, Year 8, Year 9, Year 10
    Whole Numbers, Integers, Rational, Irrational, and Real Numbers
    Located in Mathematics / Calculus / From Arithmetic to Algebra
  5. Combine like terms
    by Dr. Osama M. Khaled — published Jun 05, 2023 — last modified Jul 12, 2024 10:10 PM — filed under: Year 7
    To add or subtract objects, they must be similar
    Located in Mathematics / Algebra / Simplifying Algebraic Expressions
  6. Complementary and Supplementary Angles
    by Dr. Osama M. Khaled — published Apr 14, 2023 — last modified Jul 13, 2024 09:58 PM — filed under: Year 7
    Solve problems involving complementary and supplementary angles
    Located in Mathematics / Geometry / Fundamentals
  7. Define the set of integers
    by Dr. Osama M. Khaled — published Dec 12, 2025 — last modified Dec 12, 2025 11:12 AM — filed under: Year 7
    The set of integers is the set of negative numbers, zero, and positive numbers
    Located in Mathematics / … / Integers / An Introduction to the Integers
  8. 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
  9. Divide Fractions
    by Dr. Osama M. Khaled — published Apr 19, 2024 — last modified Jul 12, 2024 09:44 PM — filed under: Year 7
    To divide two fractions, multiply the first fraction by the reciprocal of the second fraction. Simplify the result, if possible.
    Located in Mathematics / … / Fractions and Mixed Numbers / Dividing Fractions
  10. 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
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