Originally Posted by ultramarina
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DD4.5 still has a hard time doing 3+4 but takes under a second to do 343+434.

Whoa. I don't get this at all. Brains are weird.

Let me clarify. When asked 3+4, she will try to count up from 3 to get to 7, which takes some time. But when doing the same addition but in a multidigit number, she just seems able to pull the sum out of her head. Similarly, she takes much longer to do 4 times 7 for example than 4 times 13 bcos she does 40+12 in her head. So yes it is a little weird but it seems perfectly normal when you are watching her solve it.:)