Operations and algebraic thinking

1.OA.B.4

Understand subtraction as an unknown-addend problem.

Practice for this standard

• Subtraction

  Taking away, counting up, and multi-digit subtraction with borrowing across zeros.

  • beginner worksheet
  • intermediate worksheet
  • advanced worksheet

Official wording and the full standard: CCSS.MATH.CONTENT.1.OA.B.4

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