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Common Core Standards
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| Grade: |
1st Grade |
| Standard: |
CC.2.1.1.B.2 |
| Description: |
Use place-value concepts to represent amounts of tens and ones and to compare two digit numbers. |
| Standard: |
1.NBT.B.2 |
| Description: |
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
- 10 can be thought of as a bundle of ten ones — called a "ten."
- The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
- The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
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