Lesson 6: Subtraction and Fact families
Parts of Subtraction Problem: Number Sentence
6 - 2 = 4
Subtrahends Difference
6 - 2 = 4
Subtrahends Difference
Fact Families
* Group of three numbers that can be arranged to form four facts.
Examples: 2, 4, 6
2 + 4 = 6
4 + 2= 6
6 - 4= 2
6 - 2= 4
* Group of three numbers that can be arranged to form four facts.
Examples: 2, 4, 6
2 + 4 = 6
4 + 2= 6
6 - 4= 2
6 - 2= 4