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.2a
- 10 can be thought of as a bundle of ten ones -- called a ''ten.''