We struggle with math quite a bit. She can do addition and subtraction. She can count by 2's, 5's and 10's. She just got the hang of 1 more and 1 less...until we introduced 10 more and 10 less (for the 3rd time this year). She doesn't get it at all and if I try to go back to 1 more and 1 less she suddenly doesn't remember how to do that either. I'm at a loss.
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