| | :The concept of "breaking apart numbers", seems to be an educational tool that is actually taught and is actually useful. An example of this is the mental addittion of 105+79, by saying that 79 is 1 less than 80, and 105+80 is obviously 185, so 105+79=184. But the example in the cited article is utterly ridiculous, inappropriate, and counterproductive. The article says it's a common core example, citing [https://twitter.com/hoffmanrich/status/384806802262470656/photo/1 this item by Rich Hoffmann], but that page gives no evidence that it actually came from Common Core; it just said that it came from a 3rd grade workbook, with no further information. | | :The concept of "breaking apart numbers", seems to be an educational tool that is actually taught and is actually useful. An example of this is the mental addittion of 105+79, by saying that 79 is 1 less than 80, and 105+80 is obviously 185, so 105+79=184. But the example in the cited article is utterly ridiculous, inappropriate, and counterproductive. The article says it's a common core example, citing [https://twitter.com/hoffmanrich/status/384806802262470656/photo/1 this item by Rich Hoffmann], but that page gives no evidence that it actually came from Common Core; it just said that it came from a 3rd grade workbook, with no further information. |