Learning Activity

Triple Fun Shopping (Addition Task)

Subject Area

Mathematics

Grade(s)

1

Overview

This activity is a task designed to introduce addition with three addends. The students use counters to represent the problem and begin developing an understanding of the commutative and associative properties of addition.

Mathematics (2019) Grade(s): 1

MA19.1.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20 by using concrete objects, drawings, or equations with a symbol for the unknown number to represent the problem.

Unpacked Content

UP:MA19.1.4

Vocabulary

  • Addend

Knowledge

Students know:
  • The relationship between addition and subtraction.
  • how to explain subtraction as an unknown addend.

Skills

Students are able to:
  • use symbols such as blanks, boxes, or letters to represent unknown quantities in equations.
  • Communicate the connections between subtraction and addition.
  • Use the inverse relationship between addition and subtraction to find differences.
  • Choose and apply addition and subtraction strategies to accurately determine sums and differences within 20.

Understanding

Students understand that:
  • addition and subtraction have an inverse relationship that can be used to solve problems.
Mathematics (2019) Grade(s): 1

MA19.1.3

Apply properties of operations as strategies to add and subtract.

Unpacked Content

UP:MA19.1.3

Vocabulary

  • Commutative property of addition
  • Associative property of addition
  • Identity property of zero for addition

Knowledge

Students know:
  • addition and subtraction strategies.
  • how to form an equation.
    • li>how the commutative property works.

Skills

Students are able to:
  • Strategically apply properties of addition in order to find sums.

Understanding

Students understand that:
  • the order in which addends are joined doesn't change the sum.
  • numbers may be composed or decomposed in a variety of ways.

Phase

Before/Engage
Learning Objectives

Learning Objectives

Students will be able to solve a word problem with three addends by using concrete objects.

Students will demonstrate the commutative and associative properties of addition by using concrete objects.

Activity Details

This task is an introduction to addition problems with three addends.

  • Display the slideshow for the class.
  • Students may work individually, with partners, or in table groups to represent the problem using counters.
  • As students are sharing their answers, ask them to explain how they got the total. Did they count all of the counters? Did they start with the biggest number and then count on? (If students are struggling with adding all three addends, encourage them to count all instead of counting up.)
  • Have students help you write the equation to represent the problem.
  • As you go to the next slide, tell students that Peg was really thirsty so she actually bought the slushie before she bought the unicorn and candy bar.  Does that change how much money she spent? Have students use the counters to show their thinking. (Students should be able to rearrange the groups of counters to show an understanding of the commutative property of addition.) Have students write a new equation to represent the problem.
  • Students are also asked if a particular order makes it easier to add. Students should see that adding the unicorn and the slushie (7 + 3) is a "friend of 10" which makes the addition easier (associative property).
Assessment Strategies

Assessment Strategies

Observe students as they are using their counters to see if they are representing each addend from the problem. Check to see if they are able to combine all three addends successfully.

Observe students to see if they are developing an understanding of the properties of addition. They should be able to rearrange the counters and write new equations while the sum stays the same.

Variation Tips

The prices and items in the problem can be adjusted as needed.

Related Learning Activities

Learning Activity (Before)

Triple Fun Shopping (Addition Task)

Learning Activity (During)

Letter Tile Addition

Learning Activity (After)

Three Addends Assessment

Background and Preparation

Background / Preparation

The teacher will need to display the slideshow.

Each student or student group will need at least 14 counters (or cubes, bears, etc.).

Digital Tools / Resources

https://docs.google.com/presentation/d/1EXmmcSqZ5-fu7KmDvuKR2OK8DTEAqAiqjqlc7Fc…

Approved Date

Owner (Author)

seasley
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