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2. Elementary mathematics - Wikipedia

   en.wikipedia.org/wiki/Elementary_mathematics

   Many of the concepts that students are taught in this strand are also used in other subjects such as science, social studies, and physical education [3] In the measurement strand students learn about the measurable attributes of objects,in addition to the basic metric system. Elementary Focus:

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. Math Blaster for 1st Grade - Wikipedia

   en.wikipedia.org/wiki/Math_Blaster_for_1st_Grade

   Math Blaster for 1st Grade is a 1999 educational video game in a line of educational products originally created by Davidson & Associates and continued by Knowledge Adventure. The game was re-released in 2000 as Math Blaster Mission 2 .

5. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   If each subtraction is replaced with addition of the opposite (additive inverse), then the associative and commutative laws of addition allow terms to be added in any order. The radical symbol ⁠ t {\displaystyle {\sqrt {\vphantom {t}}}} ⁠ is traditionally extended by a bar (called vinculum ) over the radicand (this avoids the need for ...

6. 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]

7. 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 ⋆ ...