These 11" x 17" laminated, write-on, wipe-off place value mats feature whole numbers (ones, tens, hundreds, thousands, ten thousands) on the front side, while the reverse includes decimals (thousandths, hundredths, tenths, ones, tens). With a 10-frame set inside each place-value column, these versatile, sturdy mats support a wide variety of instructional and practice activities in addition and subtraction. A corresponding website includes demonstrations and activity suggestions. Designed for use with Place Value Disks and Place Value Decimal Tiles or dryerase markers. Set of 10 mats.