# Lesson Planning of Number Operations

Lesson Planning of Number Operations (Commutative Property)

Subject Mathematics

Students` Learning Outcomes

• Verify commutative property with respect to addition (sum should not exceed 100).

Information for Teachers

• The word “commutative” comes from “commute” or “move around”, so the commutative property is the one that refers to moving numbers or variable around. It states that changing the order of addends does n`t change the sum, as; in case of addition, the rule is “a + b = b + a”; this means 2 + 3 = 3 + 2. • While teaching the lesson, the teacher should also consult textbook wherein and whenever it is required.

Material / Resources

Writing board, chalk/marker, duster, pointer, dice, 10 x 10 grid, number flashcards (1 digit)

Introduction

• Give some number flashcards (up to 3 digits numbers) to students. Ask them to pick any two cards and find the sum.

Development

 Activity 1 Give students two one-digit numbers Ask them to find their sum Ask them to interchange the position of both addends and find the sum again. Discuss the answer with students Motivate them to describe this phenomenon and help them to verbalize the concept of the commutative property. Verify derived definition by solving a few more questions.

 Activity 2 Give number flashcards (containing 1-digit numbers) to students in group and ask them to select any two numbers e.g. 4+3. Ask students to add both numbers to get the sum e.g. 7. Give them a few more pairs of 1 digit numbers and ask them to find the sum. After taking few equations, discuss them with students. Tell them that if we change the position of numbers, the sum remains the same. This property is called commutative property with respect to addition.

Sum up / Conclusion

• The commutative property of addition tells us that the order in which 2 numbers are added does n`t change the sum of those 2 numbers.
• Ask students to define the sum of those 2 numbers.
• Ask students to define commutative property and take few examples.

Assessment

• Write few incomplete addition equations reflecting, commutative property w.r.t. addition to complete, e.g.
•                             4+5= ___ +4,

3+6=6+_____,

3+_____=2+3

_____+7=7+4

• (These four variations should be included)
• Teacher is also required to involve the students in solving the problems given in the exercise at the end of unit/chapter.