Addition and Subtraction Facts to 12
Key Vocabulary Words: double: the numbers being added are the same. near double: an addition fact that has an addend that is one more than the other addend
2 less than: when you subtract 2
1 less than: when you subtract 1
0 less than: when you subtract 0
Doubles Videos:
- use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions (e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem)
- apply properties of operations as strategies to add and subtract
- students are relating counting to addition and subtraction (e.g., by counting on 2 to add 2)
- students are working with addition and subtraction within 20, demonstrating fluency for addition and subtraction within 10 (use strategies such as counting on; making ten; decomposing a number leading to ten; using the relationship between addition and subtraction; and creating equivalent but easier or known sums)
Key Vocabulary Words: double: the numbers being added are the same. near double: an addition fact that has an addend that is one more than the other addend
2 less than: when you subtract 2
1 less than: when you subtract 1
0 less than: when you subtract 0
Doubles Videos: