LESSON PLAN IN MATHEMATICS 4

I. Learning Objectives

Cognitive: 1. Visualize addition of similar fractions

2. Add similar fractions

Psychomotor: Compute for the sum correctly

Affective: Help in household chores

II. Learning Content

Skill: Adding similar fractions

References: BEC-PELC II. D. 1.1 -1.2

Materials: activity sheets, paper plates, charts, fraction bars

Value: Helpfulness

III. Learning Experiences

A. Preparatory Activities

1. Drill

Identify similar fractions from each set of fractions below.

a. 2, 3, 1, 2 b. 5, 2, 1, 5 3 2 3 5 6 3 6 8

c. 3, 3, 2, 2 d. 8, 1, 2, 1 4 8 3 4 9 8 9 4

2. Review

Express each fraction in lowest terms.

a. 6 b. 10 c. 6 d. 9 e. 3 8 12 9 15 6

3. Motivation

Place two pencils on one of your hand and one pencil on the other hand. Ask: “If I put together 2 pencils and 1 pencil, what do I get? Do the same with 2 stones and 2 pencils. Say: “If I put together 2 stones and 2 pencils, do I get 4 pencils? 4 stones? Why not?

B. Developmental Activities

1. Presentation

a. Use a paper plate cut into fourths to represent a “cake”. Have one pupil take ¼ of the cake. Have another pupil remove 2/4 of it. Ask: What part of the cake was taken? Show addition fractions.

1 2 = 34 4 4

Ask: Do you add the numerators? Do you add the denominators?

b. Display fraction bars like:

1 26 6

Ask: What kind of fractions are they? What is the sum? Is 3/6 in lowest terms? How can you express it in lowest terms?

c. Have the pupil read the word problem.Flordeliza helps her mother at home. She cooks lunch in 3/10 of an hour. Then

she cleans the kitchen in 5/10 of an hour. What part of an hour does she spend working in the kitchen?

Valuing:Ask: What kind of daughter is Flordeliza? How do you help your mother at home?

2. Group ActivityA. Recall the standards for group activity.B. Each group will present the output at the end of the activity.

Group 1Direction: Complete the mathematical sentence. Express the answers in lowest terms, if

needed.

1. 2. 3.

1 + 2 = 4 + 1 = 1 + 4 =5 5 6 6 4 4

Group IIDirection: Complete the mathematical sentence. Express the answers in lowest terms, if

needed.

1. 2.

2 + 4 = 3 + 1 =9 9 8 8

3.

3 + 2 = 7 7

Group IIIDirection: Write the missing fractions to complete each equation.

1. 5 + ___ = 8 2. ___ + 4 = 5 3. 2 + ___ = 6 12 12 6 6 7 7

Group IVDirection: Write the missing fractions to complete each equation.

1. 13 + 1 = ___ 2. ___ + 3 = 6 3. 7 + ___ = 10 18 18 8 8 15 15

3. GeneralizationHow do you add similar fractions?

c. ApplicationRead and solve on your paper.Katrina spent 2/4 of an hour sweeping the yard and ¼ of an hour watering the

plants. How long did she work?

To add similar fractions, add the numerator and write the sum over the common denominator. Express the answer in lowest terms, if needed.

IV. EvaluationDirection: Add and express each sum to lowest terms, if possible.

1. 1 + 2 + 4 = 4. 1 + 2 + 4 = 9 9 9 10 10 10

2. 2 + 5 = 5. 4 + 3 = 12 12 21 21

3. 3 + 2 + 5 = 15 15 15

V. Assignment

Direction: Write the third column the sum of the fractions on the first two columns.Sum

A. 14

24

B 38

28

C 410

310

D 612

212

E 315

415