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Decompose Numbers Less than 20 into Tens and Ones- 1st Grade Math
Students develop the understanding of place value concepts by learning that a 2 digit number is a number made up of tens and ones. In Numbers up to 20 Worksheet, students work on numbers from 11 to 19 and understand that the numbers from 11 to 19 are composed of 1 ten and 1,2,3,..9 ones.
Common Core Alignment
1.NBT.2Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
1.NBT.2.bThe numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.