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2. Number bond - Wikipedia

   en.wikipedia.org/wiki/Number_bond

   In mathematics education at primary school level, a number bond (sometimes alternatively called an addition fact) is a simple addition sum which has become so familiar that a child can recognise it and complete it almost instantly, with recall as automatic as that of an entry from a multiplication table in multiplication.

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. 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]

5. Is It Safe to Use Expired Vitamins? The Truth About Vitamin ...

   www.aol.com/vitamins-expire-nutritionists-weigh...

   First of all, it’s important to note that the Food and Drug Administration (FDA) does not review or approve dietary supplements for how safe or effective they may be ...

6. Arithmetic - Wikipedia

   en.wikipedia.org/wiki/Arithmetic

   For example, subtraction is the inverse of addition since a number returns to its original value if a second number is first added and subsequently subtracted, as in + =. Defined more formally, the operation " ⋆ {\displaystyle \star } " is an inverse of the operation " ∘ {\displaystyle \circ } " if it fulfills the following condition: t ⋆ ...

7. NYC woman murdered 33 years ago finally ID’d as ... - AOL

   www.aol.com/nyc-woman-murdered-33-years...

   Judy Rodriguez was 30 when her family reported her missing on January 23, 1991, a short time after her daughter Stephanie’s first birthday party. NYC woman murdered 33 years ago finally ID’d ...