My Y2 DD is learning subtractions.
In the past, to calculate say 25-12, she'd write:
25-12=
20+5-10-2=
10+3=
13
I don't like it but at least it's correct.
Today the teacher corrected her homework and wrote:
25-12=
20+5-10+2
To me, the method given by the teacher today is wrong without the use of parenthesis, which I don't expect kids to know in y2 by the way. Using this new method, DD will rightly arrive to 17 as she will add 5 and 2 but it's of course the wrong answer to the initial question.
Which method do your kids use?
Thank you.
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Subtraction - major confusion
26 replies
Bitlost · 05/01/2016 21:07
OP posts:
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