# “How many fish in the fishbowl” is a commutative property of addition lesson

Subject:

Math

1, 2, 3

Title – “How many fish in the fishbowl?”
By – Jennifer Delano
Primary Subject – Math

Note from LessonPlansPage.com: For this lesson you will need to create an example transparency and picture worksheet of a fish bowl with yellow, red, blue, and green fish.

Name of Unit or Concept: Ocean/Math

Lesson and/or Activity: “How many fish in the fishbowl?”

TEKS: 1.5 (C) Identify patterns in related addition and subtraction sentences. Examples: 2+3=5, 3+2=5

Learning Objective(s): After going over 5 “topsy turvey” (commutative property of addition) examples as a class, the learner will be able to complete the worksheet within 15 minutes.

List of Materials Needed:
1. “How many fish in the fishbowl?” worksheets

Pre-Activity Preparation:
Overhead Transparency of Topsy Turvey examples

Transition:
I need all desks cleared with everything put away.

Procedure:
Step 1 Motivation/Introduction: I need 5 quiet people to help me do a number sentence
Step 2 Number Sentence – 2 students + 3 students = 5 students (count one by one)
Step 3 Using the same kids – move one to another group
Step 4 New Number Sentence – 3 students + 2 students = 5 students (same answer)
Step 5 Do some overhead examples
Step 6 “How many fish in the fishbowl?” worksheet
Step 7 Closure: Give them another word problem on the overhead. Example: How many sharks are in the ocean? 3 Hammerheads + 5 great whites = ?

Directions: Help me find how many fish are in the fishbowl. I have given you the written sentence, now write the number sentence and then rewrite the sentence using topsy turvey.

1.
Yellow Fish + Red Fish
_______ + _______ = _______
Rewrite using topsy turvey
_______ + _______ = _______

2.
Blue Fish + Green Fish
_______ + _______ = _______
Rewrite using topsy turvey
_______ + _______ = _______

3.
Red Fish + Green Fish
_______ + _______ = _______
Rewrite using topsy turvey
_______ + _______ = _______

4.
Blue Fish + Yellow Fish
_______ + _______ = _______
Rewrite using topsy turvey
_______ + _______ = _______

5.
Red Fish + Blue Fish
_______ + _______ = _______
Rewrite using topsy turvey
_______ + _______ = _______

6.
Yellow Fish + Green Fish
_______ + _______ = _______
Rewrite using topsy turvey
_______ + _______ = _______

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