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Añadir dentro de 1000

2nd Grade

Alabama Course of Study Standards: 12

Add and subtract within 1000 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.
  1. Explain 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.

Arkansas Academic Standards: 2.NBT.7

Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and the relationship between addition and subtraction; relate the strategy to a written expression or equation

Arizona - K-12 Academic Standards: 2.NBT.7

Demonstrate understanding of addition and subtraction within 1000, connecting objects or drawings to strategies based on place value (including multiples of 10), properties of operations, and/or the relationship between addition and subtraction. Relate the strategy to a written form. See Table 1.

Common Core State Standards: Math.2.NBT.7 or 2.NBT.7

Add and subtract within 1000, 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.

North Carolina - Standard Course of Study: 2.NBT.7

Add and subtract, within 1,000, relating the strategy to a written method, using:
  • Concrete models or drawings
  • Strategies based on place value
  • Properties of operations
  • Relationship between addition and subtraction

New York State Next Generation Learning Standards: 2.NBT.7

  1. Add and subtract within 1000, 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 representation.
    Notes: Students should be taught to use concrete models and drawings; as well as strategies based on place value, properties of operations, and the relationship between addition and subtraction. When solving any problem, students can choose to use a concrete model or a drawing. Their strategy must be based on place value, properties of operations, and/or the relationship between addition and subtraction.
    A written representation is any way of showing a strategy using words, pictures, or numbers.
  2. Understand that in adding or subtracting up to 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

Tennessee Academic Standards: 2.NBT.7

Add and subtract within 1000 using concrete models, drawings, strategies based on place value, properties of operations, and/or the relationship between addition and subtraction to explain the reasoning used.
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