. Grade K, Illustrative icon

Assessing Writing Numbers

Illustrative MathematicsVaries

Students may reverse numbers when writing them, such as the number 3 or 5 as well as 6 and 9. Writing teen numbers can pose challenges for students because of the way they sound when spoken. Teen numbers (13-19) are read/spoken from right to left while other numbers are not. When '16' is spoken one hears the sound of '6' before the 'teen' part and so students will often start writing with a '6' and then pause and add the '1,' sometimes in front of the '6' but often behind it because they hear the 'teen' part second when speaking the number name.

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