Standards Map

Mathematics > Grade 2 > Number and Operations in Base Ten
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Mathematics | Grade : 2

Domain - Number and Operations in Base Ten

Cluster - Use place value understanding and properties of operations to add and subtract.

[2.NBT.B.7] - Add and subtract within 1,000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

Resources:


  • Addition and subtraction within 5, 10, 20, 100, or 1,000
    Addition or subtraction of two whole numbers with whole number answers, and with sum or minuend in the range 0–5, 0–10, 0–20, or 0–100, respectively. Example: 8 + 2 = 10 is an addition within 10, 14 – 5 = 9 is a subtraction within 20, and 55 – 18 = 37 is a subtraction within 100.
  • Compose numbers
    a) Given pairs, triples, etc. of numbers, identify sums or products that can be computed; b) Each place in the base-ten place value is composed of ten units of the place to the left, i.e., one hundred is composed of ten bundles of ten, one ten is composed of ten ones, etc.
  • Decompose numbers
    Given a number, identify pairs, triples, etc. of numbers that combine to form the given number using subtraction and division.
  • Properties of operations
  • Standard Algorithms for Addition and Subtraction

Predecessor Standards:

No Predecessor Standards found.

Successor Standards:

  • 3.NBT.A.2
    Fluently add and subtract within 1,000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction. [Note: A range of algorithms may be used.]

Same Level Standards:

  • 2.NBT.A.1
    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:
  • 2.NBT.B.6
    Add up to four two-digit numbers using strategies based on place value and properties of operations.
  • 2.NBT.B.8
    Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
  • 2.NBT.B.9
    Explain why addition and subtraction strategies work, using place value and the properties of operations. [Note: Explanations may be supported by drawings or objects.]