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2. Investigations in Numbers, Data, and Space - Wikipedia

   en.wikipedia.org/wiki/Investigations_in_Numbers...

   Investigations was developed between 1990 and 1998. It was just one of a number of reform mathematics curricula initially funded by a National Science Foundation grant. The goals of the project raised opposition to the curriculum from critics (both parents and mathematics teachers) who objected to the emphasis on conceptual learning instead of instruction in more recognized specific methods ...

3. Subtraction - Wikipedia

   en.wikipedia.org/wiki/Subtraction

   [2] In a sense, subtraction is the inverse of addition. That is, c = a − b if and only if c + b = a. In words: the difference of two numbers is the number that gives the first one when added to the second one. Subtraction follows several important patterns. It is anticommutative, meaning that changing the order changes the sign of the answer.

4. Exercise (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Exercise_(mathematics)

   At the Russian School of Mathematics, students begin multi-step problems as early as the first grade, learning to build on previous results to progress towards the solution. In the 1960s, collections of mathematical exercises were translated from Russian and published by W. H. Freeman and Company : The USSR Olympiad Problem Book (1962), [ 8 ...

5. No. 1 Tennessee beats No. 23 Arkansas 76-52 to match best ...

   www.aol.com/no-1-tennessee-beats-no-203722232.html

   Chaz Lanier scored 29 points to lead No. 1 Tennessee over No. 23 Arkansas 76-52 on Saturday and tie for the best start to a season in program history. The Volunteers (14-0, 1-0 Southeastern ...

6. Texas warning of "maneater" screwworms that lay eggs in flesh

   www.aol.com/texas-warning-maneater-screwworms...

   Just one fly can lay up to 300 eggs at a time and is drawn "to the odor of a wound or natural opening on a live, warm-blooded animal."

7. What is behind the tradition of eating 12 grapes on New Year's?

   www.aol.com/behind-tradition-eating-12-grapes...

   A vendor in Madrid weighs a bunch of grapes at the market on New Year's Eve. / Credit: Europa Press News via Getty Images