“Many problems that appear in later numeracy can be traced back to a lack of understanding of place value. It therefore needs careful attention, particularly when zeros are involved.” – Chinn & Ashcroft, Mathematics for Dyslexics Place value may be covered quite quickly in a student’s first math lessons, but for the dyslexic student, who likely will have trouble with multi-stepped procedures and working memory overload, the problem will spread beyond borrowing and regrouping, into multiplication, decimals, and algebra. At left, from Diane Montgomery’s Teaching Gifted Children with Special Educational Needs, see examples of systematic place value errors. 83 +49 1212 #1: Carry-over mistake in addition. 46 -39 13 #2. Borrowing – Regrouping error in subtraction. 43 x 5 = 205 #3. Carryover mistake in […]
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