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2. Dyscalculia - Wikipedia

   en.wikipedia.org/wiki/Dyscalculia

   Most adults with dyscalculia have a hard time processing math at a 4th-grade level. For 1st–4th grade level, many adults will know what to do for the math problem, but they will often get them wrong because of "careless errors", although they are not careless when it comes to the problem.

3. Saxon math - Wikipedia

   en.wikipedia.org/wiki/Saxon_math

   The Saxon Math 1 to Algebra 1/2 (the equivalent of a Pre-Algebra book) curriculum [3] is designed so that students complete assorted mental math problems, learn a new mathematical concept, practice problems relating to that lesson, and solve a variety of problems. Daily practice problems include relevant questions from the current day's lesson ...

4. Mental calculation - Wikipedia

   en.wikipedia.org/wiki/Mental_calculation

   The basic algorithm, as best exemplified in a 2 • 2 multiplication problem, is as follows (where t represent a tens digit, u represent a units digit, and T symbolizes the tens digit multiplied by its respective power): Step 1 = (t 1 - u 1) • u 2 = A Step 2 = u 1 • t 2 = B Step 3 = (u 1 • u 2) + t (u 1 • u 2) = C

5. 10 Hard Math Problems That Even the Smartest People in the ...

   www.aol.com/10-hard-math-problems-even-150000090...

   Goldbach’s Conjecture. One of the greatest unsolved mysteries in math is also very easy to write. Goldbach’s Conjecture is, “Every even number (greater than two) is the sum of two primes ...

6. ‘Heartbreaking’ test score shows US children falling behind ...

   www.aol.com/news/heartbreaking-test-score-shows...

   America’s children have continued to lose ground on reading skills in the wake of the COVID-19 pandemic and have made little improvement in math, according to the latest results of an exam known ...

7. Otis–Lennon School Ability Test - Wikipedia

   en.wikipedia.org/wiki/Otis–Lennon_School...

   For the 2007–08 school-year, New York City began using the OLSAT to infer gifted pedagogical needs of public school children entering kindergarten through 3rd grade. Preschools – and a cottage industry of test preparation companies – soon thereafter began offering OLSAT test-preparation. OLSAT attempts to infer "school ability" for a ...