UP:MA19.1.14
Vocabulary
- Ten more
- Ten less
Knowledge
Students know:
- how to mentally find 10 more or 10 less of a two digit number and explain reasoning.
- place value vocabulary: tens, ones.
Skills
Students are able to:
- mentally add or subtract 10 from a number in the range from 1
- 100.
- Explain their reasoning using place value understanding and patterns.
Understanding
Students understand that:
- patterns in the place value system can be used to mentally compute sums and differences.
