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2.NBT Regrouping
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2.NBT Regrouping

Alignments to Content Standards

  • Grade 2
    Domain
    NBT: Number and Operations in Base Ten
    Cluster
    Understand place value.
    Standard
    Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

Tags

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  1. What number represents the same amount as 2 tens + 7 ones?
  2. What number represents the same amount as 4 tens + 0 ones?
  3. What number represents the same amount as 5 tens + 12 ones?
  4. What number represents the same amount as 3 hundreds + 18 tens + 5 ones?
  5. What number represents the same amount as 7 hundreds + 19 tens?

Commentary

This task serves as a bridge between understanding place-value and using strategies based on place-value structure for addition. Place-value notation leaves a lot of information implicit. The way that the numbers are represented in this task makes this information explicit, which can help students transition to adding standard base-ten numerals.



Solutions

Solution: Answers
  1. 27
  2. 40
  3. 62
  4. 485
  5. 890


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