Standard
- CCSS.Math.Content.1.NBT
- Number and Operations in Base Ten
- CCSS.Math.Content.1.NBT.B
- Understand place value.
- CCSS.Math.Content.1.NBT.B.2
- Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
- CCSS.Math.Content.1.NBT.B.2b
- The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.