Lesson 3: Number Families

A Segment of: Math Mastery: Addition
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Math Mastery: Addition [30:00]
10 Segments
Lesson 1: Getting Started [02:45]
Lesson 2: Column Addition [03:22]
Lesson 3: Number Families [05:18]
Lesson 4: More Column Addition [04:16]
Lesson 5: Adding Dollars and Cents [03:24]
Lesson 6: Problem Solving Using Data Tables [03:00]
Lesson 7: Adding Large Numbers [05:14]
Lesson 8: Solving Comparison Problems [05:43]
Lesson 9: Using Tables to Solve Problems [05:17]
Lesson 10: Addition Word Problems [04:19]

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Segment Description

Number families are groups of three numbers, two small and one big, that are used to form two addition and two subtraction equations. Students learn that when the big number is missing, they must add the two small numbers together to find the solution, but when a small number is missing they must subtract the small number from the big number to find the solution.

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Grades: 3-5   |   Copyright: 2001