UP:MA19.4.10
Vocabulary
- Addition
- Subtraction
- Standard algorithm
- Place value
- Decompose
- Compose
- Fluently
- Multi-digit
- Strategy
- Difference
- Sum
Knowledge
Students know:
- a variety of accurate and efficient strategies to find sums and differences and use them when appropriate.
Skills
Students are able to:
- Use place value strategies to add and subtract multi-digit numbers.
- Use the standard algorithm for addition and subtraction and connect strategies to the standard algorithm.
Understanding
Students understand that:
- There are a variety of strategies, models, and representations for solving mathematical problems with addition and subtraction.
- Efficient application of computation strategies is based on the numbers and operations in the problems.
- The steps used in the standard algorithm for addition and subtraction can be justified by using the relationship between addition and subtraction and the understanding of place value.
