Please present evidence that the workbook in question did not, in an earlier lesson, teach a kid how to add 7 to 7 directly. If you have no such evidence, then you have no argument.
The other day some moron scribbled a bunch of numbers on a piece of paper, took a picture of it, and posted it to FR as an example of Commie-core, and the predictable outrage began. I find it disturbing that so many people on FR can be so easily and willfully be duped into a 2-minute hatefest.
Adding 7 to anything is probably grade 2 math. If they are breaking up the 7 to show how parts of the 7 works to add to numbers, they are teaching the principle in grade 2, which would be too early to learn that mathematical principle.
Adding 7 to anything should be a point of rote, imo.
Not sure if I can scronge through some old math papers, but my kids were forced to learn adding stuff like this right away.
I had to go into the teacher to get it explained to me so I could help my kids! They did not start with the basics, and as I posted earlier, it was/is(?) against the rules to do “math facts”
The idea of adding 13 + 18 was not taught as a 3+8, carry the one problem AT ALL.
It was taught as 13-3 = 10.
18+2 = 20, so 10 + 20 = 30. But, you need to add in the 3 that you subtracted from the 13, so that is 33. AND, you need to subtract the 2 that you added to the 18 - so 33-2 = 31. Any they would have to show their work on that for each and every problem.
I told my kids at the time that that is how I would sometimes add numbers in my head, and that it has merit, but to look at every problem like this was nuts. Especially when lots/most of the kids didn’t have their basic math facts.
Interestingly, my one daughter did fine with the common-core way and terrible at first with straight math. My other daughter was vice-versa. She would answer the 13+18 problem using “regular” math and would get marked down. I told her and her teacher that as long as she got the correct answer that was okay with us. The teacher still marked it wrong because she didn’t do it the “right” way. Oh well, her bad grade in 4th grade probably won’t come back to haunt her.