3.NBT.2

3.NBT.2 – Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

Internet Resources (Videos, Websites, etc.)

DigitWhiz Games (Website and iPad app)

K-5 Math Teaching Resources

  1. 3 Digit Addition Split
  2. Doubling to 1000
  3. Difference Add

Khan Academy

  1. Addition with carrying
  2. Subtraction with borrowing

Learn Zillion

  1. Solve addition problems using the partial sums method
  2. Solve for unknowns using the commutative property of addition
  3. Solve addition problems using complements of ten
  4. Solve addition word problems by identifying key phrases
  5. Use addition and subtraction fact families to solve for unknown amounts
  6. Solve subtraction word problems by identifying key phrases
  7. Solve subtraction problems using a number line
  8. Solve subtraction problems: using regrouping
  9. Solve addition problems: using partial sums
  10. Solve division problems: using equal groups
  11. Solve addition problems: using complements of 10
  12. Solve for unknowns: using commutative property
  13. Check addition and subtraction problems: using the inverse operation
  14. Solve subtraction problems: using key vocabulary
  15. Solve subtraction problems: using number line
  16. Solve for unknowns: using fact families
  17. Solve addition problems with numbers up to 1,000: regrouping
  18. Solve addition problems: using key vocabulary

NCTM Illuminations

  1. Electronic Abacus
  2. Mathematics and Football: Unit Overview
  3. Number Line Journeys

Online Practice from IXL

  1. Place values: Value of a digit
  2. Place values: Identify the digit with a particular place value
  3. Place values: Convert from expanded form
  4. Addition: Add two numbers up to three digits
  5. Addition: Add two numbers up to three digits – word problems
  6. Addition: Complete the addition sentence – up to three digits
  7. Addition: Balance addition equations – up to three digits
  8. Addition: Addition patterns over increasing place values
  9. Subtraction: Subtract numbers up to three digits
  10. Subtraction: Subtract numbers up to three digits – word problems
  11. Subtraction: Complete the subtraction sentence – up to three digits
  12. Subtraction: Balance subtraction equations – up to three digits
  13. Subtraction: Subtraction patterns over increasing place values
  14. Properties: Properties of addition
  15. Properties: Solve using properties of addition

Shodor

  1. Caesar Cipher
  2. Caesar Cipher II
  3. Caesar Cipher III

Study Jams by Scholastic

  1. Place Value Lesson and Practice

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