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2. Cross-multiplication - Wikipedia

   en.wikipedia.org/wiki/Cross-multiplication

   The rule of three [1] was a historical shorthand version for a particular form of cross-multiplication that could be taught to students by rote. It was considered the height of Colonial maths education [ 2 ] and still figures in the French national curriculum for secondary education, [ 3 ] and in the primary education curriculum of Spain.

3. Rule of marteloio - Wikipedia

   en.wikipedia.org/wiki/Rule_of_marteloio

   The rule of marteloio is a medieval technique of navigational computation that uses compass direction, distance and a simple trigonometric table known as the toleta de marteloio. The rule told mariners how to plot the traverse between two different navigation courses by means of resolving triangles with the help of the Toleta and basic arithmetic.

4. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   [2] [3] Thus, in the expression 1 + 2 × 3, the multiplication is performed before addition, and the expression has the value 1 + (2 × 3) = 7, and not (1 + 2) × 3 = 9. When exponents were introduced in the 16th and 17th centuries, they were given precedence over both addition and multiplication and placed as a superscript to the right of ...

5. Rule of three - Wikipedia

   en.wikipedia.org/wiki/Rule_of_three

   Rule of three (computer programming), a rule of thumb about code refactoring; Rule of three (hematology), a rule of thumb to check if blood count results are correct; Rule of three (mathematics), a method in arithmetic; Rule of three (medicinal chemistry), a rule of thumb for lead-like compounds; Rule of three (statistics), for calculating a ...

6. Why the ‘3 Months’ Salary’ Rule for an Engagement ... - AOL

   www.aol.com/why-3-months-salary-rule-140006498.html

   Most jewelers agree that the "three month's salary" rule for an engagement ring no longer applies. This guideline would indicate that if you make $100,000 a year -- barely enough to afford a house ...

7. Trump says US should 'NOT GET INVOLVED' in conflict in Syria

   www.aol.com/news/trump-says-us-not-involved...

   WASHINGTON (Reuters) -President-elect Donald Trump said on Saturday the U.S. should not be involved in the conflict in Syria, where rebel forces are threatening the government of President Bashar ...

8. Cross product - Wikipedia

   en.wikipedia.org/wiki/Cross_product

   The cross product with respect to a right-handed coordinate system. In mathematics, the cross product or vector product (occasionally directed area product, to emphasize its geometric significance) is a binary operation on two vectors in a three-dimensional oriented Euclidean vector space (named here ), and is denoted by the symbol .

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   Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.