Who's in the fact family?
http://illuminations.nctm.org/LessonDetail.aspx?ID=L120
A lesson plan for grades K–2 Mathematics
In this lesson, the fifth of a six-part Illuminations unit titled “Macaroni Math,” students explore the relation of addition to subtraction. Students use problem-solving skills to find fact families, including those in which one addend is zero or in which the addends are alike.
North Carolina Curriculum Alignment
Mathematics (2004)
Grade 1
- Goal 1: Number and Operations - The learner will read, write, and model whole numbers through 99 and compute with whole numbers.
- Objective 1.03: Develop fluency with single-digit addition and corresponding differences using strategies such as modeling, composing and decomposing quantities, using doubles, and making tens.
- Objective 1.04: Create, model, and solve problems that use addition, subtraction, and fair shares (between two or three).
Grade 2
- Goal 1: Number and Operations - The learner will read, write, model, and compute with whole numbers through 999.
- Objective 1.03: Create, model, and solve problems that involve addition, subtraction, equal grouping, and division into halves, thirds, and fourths (record in fraction form).
- Objective 1.05: Create and solve problems using strategies such as modeling, composing and decomposing quantities, using doubles, and making tens and hundreds.
