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The Place value Chart above is aligned, either partially or wholly, with the standard KNBT01 from the Common Core Standards For Mathematics (see the shortened extract below). The resources below are similarly aligned.
Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (such as 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.