How to Read a Ruler - The Cornucopia Learning Network
Convert mm, cm to fraction or decimal inches (in = mm = cm)
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3 Pack Two-Color Scale (inch, cm)Plastic Ruler Set Straight Ruler Plastic Measuring Tool for Student School Office (6 inch Ruler,8 inch Ruler, 12 inch ruler/15,20,30cm) - - Amazon.com
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Inch cm hi-res stock photography and images - Alamy
Centimeters and Inches Worksheet: Free Printable PDF for Kids