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At each step I hear (not see) a “new” addition problem. In my mind the problem sounds like this: 858 plus 634 is 1458 plus 34 is 1488 plus 4 is 1492.
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pdf

owner: feasthat - (no access) - Secrets of Mental Math.pdf, p43


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statusnot read reprioritisations
last reprioritisation on suggested re-reading day
started reading on finished reading on

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