Numbers Many Ways

Students work with subtraction at the intuitive level as they explore number families and ways to decompose numbers to 10. They will also identify members of fact families. (A fact family is a set of three [or two] numbers that can be related by addition and subtraction, for example: 7 = 4 + 3, 7 = 3 + 4, 7 - 4 = 3, and 7 - 3 = 4. When the number is a double, there are only two members of the fact family. An example would be 10 - 5 = 5, and 5 + 5 = 10.)

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Weblink address (URL): 
Numbers Many Ways

Standards & Objectives

Learning objectives: 

Students will:

  • Represent numbers in flexible ways.
  • Connect numerals to the quantities they represent.
  • Identify the addition and subtraction sentences related to a specific sum and pair of addends.
Essential and guiding questions: 

How many buttons are on the red side of this sheet? On the blue side? How many in all? What addition sentences could you write to show that? What subtraction sentences? 

What was one sum that we used? What pairs of addends had that sum? 

What pairs of addends make a sum of four? Of one? 

Would you get the same sum if you had two buttons on the blue side and three on the red side as you would if you had three on the blue side and two on the red side? Can you write the addition sentences that show that? What are the related subtraction facts for this family?

Lesson Variations

Blooms taxonomy level: 
Applying

References

Contributors: 
Angela Hamilton
Originator: 
Ayers Institute for Learning & Innovation