confusion with subtraction

 

these are some wrong common mistakes I noticed :

 

 

 

Parents,
We started subtraction yesterday and it was not bad, there were some frustration but not to worry, it is like that with new topics.
I notice some common mistakes:
first one is the top problem in blue, if the question is 5-1, they end up drawing 5 dots and then they draw another dot and then cross out the dot, that's why the answer is still 5.
second mistake, they are not looking at the sign and they still think it is addition, so if the problem is 4-1, they write a + sign and draw another circle, so the answer is still 5.

please follow the correct example below

Some other common mistakes:
*please make sure they draw their circles clearly, and that they don't over lap, otherwise they get confused as to how many circles they draw
*please make sure they draw the correct amount of circles, example 2-1, and if they draw 3 circles first instead of 2, then their answer will be wrong
*I expect them to draw the circles in the correct way, I don't expect to memorize it, that's why I have the how to draw the circles the correct way up on my whiteboard all the time, so that way they can refer to it constantly
*please make sure they look at the sign carefully (they must know the difference between + and -
*this is important, that they do NOT draw another circle, for example 10-1=
they should draw 10 circles and cross out one, they SHOULD NOT DRAW 10 circles - one circle and then cross out one, that way their answer is wrong and they get confused (see first blue problem for sample)
THE CORRECT WAY: for example if 8-1=
they should draw 8 circles and then cross out one then count whenever circle is left ( do NOT count the cross out circle)

Thanks!