# WWYD...math

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Ds7 has been doing great in math. He is using Singapore 2A. We are doing addition of 2 and 3 digit numbers with renaming. Yesterday he did 34 problems (in 2 different sittings) and got every one correct. Today was his test, and he made a 72. :001_huh:

So, here is what I *think* happened. I noticed he did not write out any of the problems, even after I reminded him to and showed him where there was space on his paper to write them out. He apparently did them all in his head. On the ones he missed, he got one of the numbers wrong. So, I think he was "losing" the number he was carrying in his head. He did the extra practice worksheet as review before his test, and didn't have a problem with it.

My question is, what would you do in this situation? I know that he can do this, because he has been doing it up until today. Any suggestions on where I can find more practice adding 3 digit numbers with renaming? Or do you think it is more of a lack of attention(there was a lack of focus today)? He will be retested on this when we take our Unit 1 and 2 comprehensive test.

I did have him correct the ones he missed.

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If you can see a pattern in his errors, I would show him what he keeps doing wrong. Then, I would give him several of the same problems (or all of them) and see if he makes the same mistake again. That should help you see if it was due to being tired or unfocused, or if he is actually doing the problem incorrectly.

Do you use the IP or CWP?

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Thanks! That is a good idea to have him re-do the same problems. I think I will type up the ones he missed and give him that to do tomorrow during math and see how he does.

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Thanks! That is a good idea to have him re-do the same problems. I think I will type up the ones he missed and give him that to do tomorrow during math and see how he does.

You are welcome. I hope it was just lack of focus or something easy to correct.

If it is an error in the way he is approaching or "seeing" the problem, you could see if any online resources show it in a way that clicks with him (ex. Education Unboxed).

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I would probably expect him to write out the sums - mental math is great but even in a restaurant they give you a pen and let you add it on paper and the more digits you ciome acriss the more you seem to need to use paper so its a skill wiorth getting right now - at 7 there is also the issue of lining up numbers correctly which will only be learnt through practice.

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Thanks! That is a good idea to have him re-do the same problems. I think I will type up the ones he missed and give him that to do tomorrow during math and see how he does.

How did it go? :001_smile:

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I typed up the problems he missed and had him re-do them the next day and he got them all correct. Maybe he will learn from this that he needs to write out the problems like Mom tells him to!

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I've explained to DS8 (and it sunk in this year) many times that if he writes it down and shows his work we can see where he made a mistake and just fix it from there --- if he doesn't write it down he has to redo the whole problem as we can't tell where the mistake was made. he is very much against having to redo the entire problem so he has started writing things down much more :)

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