UP:MA19.2.13
Knowledge
Students know:
- use place value models for adding and subtracting numbers from 1 to 1000.
- use strategies for mentally adding and subtracting multiples of 10 and 100.
Skills
Students are able to:
- use patterns and regularity in counting sequences and understandings of place value to add or subtract a "ten" or a "hundred".
- communicate reasoning and solution strategies.
Understanding
Students understand that:
- the digits of a 3-digit number represent amounts of hundreds, tens and ones.
- patterns in the place value system can be used to mentally compute sums and differences.
