Mathematics (2019) Grade(s): 1

MA19.1.3

Apply properties of operations as strategies to add and subtract.

Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known (commutative property of addition).

To add 2 + 6 + 4, the second and third numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12 (associative property of addition).

When adding 0 to a number, the result is the same number (identity property of zero for addition).

Unpacked Content

Knowledge

Students know:
  • addition and subtraction strategies.
  • how to form an equation.
    • li>how the commutative property works.

Skills

Students are able to:
  • Strategically apply properties of addition in order to find sums.

Understanding

Students understand that:
  • the order in which addends are joined doesn't change the sum.
  • numbers may be composed or decomposed in a variety of ways.

Vocabulary

  • Commutative property of addition
  • Associative property of addition
  • Identity property of zero for addition

Aligned Learning Resources

Where Oh Where Has My Addend Gone?
Bear Scan: The Odd Squad
The Distributive Property, Part 2
Three Addends Assessment
Triple Fun Shopping (Addition Task)
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