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2. Subtraction - Wikipedia

   en.wikipedia.org/wiki/Subtraction

   Subtraction is an operation that represents removal of objects from a collection. [ 1 ] For example, in the adjacent picture, there are 5 − 2 peaches—meaning 5 peaches with 2 taken away, resulting in a total of 3 peaches. Therefore, the difference of 5 and 2 is 3; that is, 5 − 2 = 3.

3. Lattice multiplication - Wikipedia

   en.wikipedia.org/wiki/Lattice_multiplication

   Lattice multiplication, also known as the Italian method, Chinese method, Chinese lattice, gelosia multiplication, [1] sieve multiplication, shabakh, diagonally or Venetian squares, is a method of multiplication that uses a lattice to multiply two multi-digit numbers. It is mathematically identical to the more commonly used long multiplication ...

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. Grid method multiplication - Wikipedia

   en.wikipedia.org/wiki/Grid_method_multiplication

   Grid method multiplication. The grid method (also known as the box method) of multiplication is an introductory approach to multi-digit multiplication calculations that involve numbers larger than ten. Because it is often taught in mathematics education at the level of primary school or elementary school, this algorithm is sometimes called the ...

6. Is 4 too young for kindergarten? I agonized over sending my ...

   www.aol.com/news/4-too-young-kindergarten...

   In most states, children must be 5 years old by August or September to enter kindergarten, but in New York City, where I live, the public school cutoff is Dec. 31. Millie was born on Dec. 14, so ...

7. Woman Shares How Quickly Ducklings Grow and It’s Downright ...

   www.aol.com/woman-shares-quickly-ducklings-grow...

   Tonia is a duck mom and shares all things related to ducks on her social media channels. She shared a video on Saturday, August 17th of how fast a duckling grows, and it is eye opening! Tonia ...