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2. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   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 their base. [2]

3. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   Some students studying math may develop an apprehension or fear about their performance in the subject. This is known as math anxiety or math phobia, and is considered the most prominent of the disorders impacting academic performance. Math anxiety can develop due to various factors such as parental and teacher attitudes, social stereotypes ...

4. Integer - Wikipedia

   en.wikipedia.org/wiki/Integer

   An integer is the number zero , a positive natural number (1, 2, 3, etc.) or a negative integer (−1, −2, −3, etc.). The negative numbers are the additive inverses of the corresponding positive numbers. The set of all integers is often denoted by the boldface Z or blackboard bold.

5. 30 Math Puzzles (with Answers) to Test Your Smarts - AOL

   www.aol.com/30-math-puzzles-answers-test...

   These math puzzles with answers are a delightful challenge. The post 30 Math Puzzles (with Answers) to Test Your Smarts appeared first on Reader's Digest.

6. You'll entertain your dog for hours with this interactive ...

   www.aol.com/lifestyle/youll-entertain-your-dog...

   Qinlianf 5-Outlet Extender. One of our favorite interactive toys for bored dogs — this Hide-A-Squirrel Interactive Puzzle Toy — is on sale on Amazon for 35% off, but with a $2 on-page coupon ...

7. Today's Savannah Guthrie Is Taking 'Time Off': Find Out Who ...

   www.aol.com/entertainment/todays-savannah...

   Third hour of Today host Sheinelle Jones filled in for Savannah Guthrie on the first two hours of the NBC morning show’s Monday, April 22, episode. Guthrie’s cohost Hoda Kotb revealed that the ...

8. Natural number - Wikipedia

   en.wikipedia.org/wiki/Natural_number

   Natural numbers can be used for counting: one apple; two apples are one apple added to another apple, three apples are one apple added to two apples, ...

9. 1 − 1 + 2 − 6 + 24 − 120 + ⋯ - Wikipedia

   en.wikipedia.org/wiki/1_%E2%88%92_1_%2B_2_%E2%88...

   1 − 1 + 2 − 6 + 24 − 120 + ⋯. In mathematics, is a divergent series, first considered by Euler, that sums the factorials of the natural numbers with alternating signs. Despite being divergent, it can be assigned a value of approximately 0.596347 by Borel summation .