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MA19.1.3
Apply properties of operations as strategies to add and subtract.

Apply properties of operations as strategies to add and subtract.

### Unpacked Content

## UP:MA19.1.3

### Vocabulary

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

### Knowledge

- addition and subtraction strategies.
- how to form an equation. li>how the commutative property works.

### Skills

- Strategically apply properties of addition in order to find sums.

### Understanding

- the order in which addends are joined doesn't change the sum.
- numbers may be composed or decomposed in a variety of ways.