Remember the Prego commercials- It’s in there! While some would like to promote the false idea that CC doesn’t include fuzzy math, the standards clearly call for these methods. Here is a little example that a viewer sent to Rich Hoffman at News 12.
Here is the standard that illustrates these methods:
- CCSS.Math.Content.1.OA.C.6 Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
In grade two they call for the use of these strategies to show FLUENCY in addition and subtraction of numbers 0-20. I thought fluently meant quick, efficient and accurate, not the above.
- CCSS.Math.Content.2.OA.B.2 Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.
- 2See standard 1.OA.6 for a list of mental strategies.
For the record, knowing all sums of two digit numbers if expected an entire year earlier in high performing countries. The CC delays this expectation for our students. They delay having kids committing these basic facts to memory so they will have to rely on other methods like the ones above.