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2. Elementary arithmetic - Wikipedia

   en.wikipedia.org/wiki/Elementary_arithmetic

   Elementary arithmetic is a branch of mathematics involving addition, subtraction, multiplication, and division. Due to its low level of abstraction, broad range of application, and position as the foundation of all mathematics, elementary arithmetic is generally the first branch of mathematics taught in schools. [1] [2]

3. Addition - Wikipedia

   en.wikipedia.org/wiki/Addition

   To prove the usual properties of addition, one must first define addition for the context in question. Addition is first defined on the natural numbers. In set theory, addition is then extended to progressively larger sets that include the natural numbers: the integers, the rational numbers, and the real numbers. [53]

4. Carry (arithmetic) - Wikipedia

   en.wikipedia.org/wiki/Carry_(arithmetic)

   A typical example of carry is in the following pencil-and-paper addition: 1 27 + 59 ---- 86 7 + 9 = 16, and the digit 1 is the carry. The opposite is a borrow, as in −1 47 − 19 ---- 28 Here, 7 − 9 = −2, so try (10 − 9) + 7 = 8, and the 10 is got by taking ("borrowing") 1 from the next digit to the left. There are two ways in which ...

5. Chicago teenager in a coma after family shot at in Mexico; 3 ...

   www.aol.com/chicago-teenager-coma-family-shot...

   A Chicago teenager is in a coma and three of his family members are dead after the group was shot at while vacationing in Mexico last week, according to the U.S. State Department and local reports ...

6. NFL playoff watchability rankings: Which wild-card game is best?

   www.aol.com/nfl-playoff-watchability-rankings...

   Let’s instead embark on what has become one of our favorite wild-card week traditions and rank the six games this weekend from worst to first by watchability. 6.

7. A Daily Avocado Habit Is Linked to Better Food Choices, Study ...

   www.aol.com/daily-avocado-habit-linked-better...

   Sofía Vergara gets flirty with Formula 1 driver Lewis Hamilton on NYC lunch date. Entertainment. People. King Charles playfully jabs at Rod Stewart and the rocker plays along. Finance.