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  1. Euclid put together concepts of geometry and numbers in a book called Elements, which was used as math reference for more than 2000 years
    by Dr. Osama M. Khaled — published May 22, 2022 — last modified Jun 09, 2025 08:47 PM — filed under: History Located in Mathematics / … / Fundamentals / History of Geometry
  2. Eukaryotic cells divide by two types of nuclear division. Name them both.
    by Dr. Osama M. Khaled — published Jun 16, 2026 — last modified Jun 16, 2026 06:25 PM Located in Biology / Cell Division / Cell Division Review
  3. Evaluate – Three Negative Factors
    by Dr. Osama M. Khaled — last modified May 07, 2026 10:08 PM Located in Mathematics / … / Order of Operations and Estimation / Use the order of operation rule
  4. Evaluate -(-6) + (-18) - 4 - (-51)
    by Dr. Osama M. Khaled — published Feb 27, 2026 — last modified Feb 27, 2026 09:09 AM Located in Mathematics / … / Subtracting Integers / Evaluate expressions involving subtraction and addition
  5. Evaluate -1 - (-2) -10
    by Dr. Osama M. Khaled — last modified Feb 24, 2026 01:27 PM Located in Mathematics / … / Subtracting Integers / Evaluate expressions involving subtraction and addition
  6. Evaluate Algebraic Expressions
    by Dr. Osama M. Khaled — published Aug 20, 2022 — last modified Jul 12, 2024 10:03 PM — filed under: Year 7
    We substitute given numbers for each variable and perform the necessary calculations in the proper order
    Located in Mathematics / Algebra / Basics
  7. Evaluate Exponential Expression with Negative Base – Even Exponent
    by Dr. Osama M. Khaled — published May 04, 2026 Located in Mathematics / … / Multiplying Integers / Evaluate exponential expressions that have negative bases
  8. Evaluate Exponential Expression with Negative Base – Odd Exponent
    by Dr. Osama M. Khaled — published May 04, 2026 Located in Mathematics / … / Multiplying Integers / Evaluate exponential expressions that have negative bases
  9. Evaluate exponential expressions that have fractional bases
    by Dr. Osama M. Khaled — published Mar 12, 2024 — last modified Jul 12, 2024 09:41 PM — filed under: Year 7
    If the base of an exponential expression is a fraction, the exponent tells us how many times to write that fraction as a factor
    Located in Mathematics / … / Fractions and Mixed Numbers / Multiplying Fractions
  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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