Melloso, Cristy T.BEEd IV-1

Lesson Plan in Mathematics VI (Third Quarter)

I. ObjectivesAt the end of the lesson, the students will be able to:

A. Cognitive: Find the missing term in Proportion.B. Affective: Believe that they can form ratio and proportion for group of

objects or numbers.C. Psychomotor: Use colon and fraction form in writing ratios and

proportion.

II. Subject Matter

A. Topic: Ratio and ProportionB. References: Mathematics for Everyday Use Textbook, pages 128-134

Today’s Math Textbook, page 218C. Materials: Chalks, Laptop for PowerPoint presentationD. Values Focus: Self-confident, Appreciate Numbers and Dedicated to

work

III. Procedure

Preparatory ActivitiesA. Drill

Direction: Express the following fractions in lowest term.

1. 9/182. 15/303. 28/204. 72/95. 18/42

B. ReviewDirection: Divide the following.

1. 2/3 ÷ 4/9 = n2. 4/5 ÷ 2/15 = n3. 8/9 ÷ 5/6 = n4. 3/8 ÷ 1/4 = n5. 3/8 ÷ 2/3 = n

Developmental ActivitiesC. Motivation

The teacher will play a short video about Math so that, student will cooperate and listen carefully.

D. Presentation

Teacher will present lessons through PowerPoint Presentation.

E. Discussion

What is Ration? What is Proportion?

- Ratio is a comparison of two quantities.- Two equal ratios form a proportion.- Ratios can be written as fractions.- We use colon ( : ) or fraction form (x/y) in writing ratios.

Example:Yaya Dub planted 12 fruit trees in his orchard. Of these trees, 5

are mango trees and the rest are apple trees. *picture*

Let us compare the number of Mango trees to the total fruit trees planted.The ratio is 5:12 or 5/12

- Ratios, like fraction can expressed in lowest term.Example:

In a classroom, there are 4 boys and two girls.The ratio is 4:2 or 2:1

- Remember, ratios must expresses first in both measurement and unit.Example:

6hours to 2daysTo make the unit same, we will change days to hours.The result is 6hours to 48hours.The ratio is 6:48 or 1:8

- The statement that two ratios are equal called Proportion.Example:3:10 = 15:50

- Finding the term in proportion.n:3 = 10:15 *n is the unknown variable.

To find the unknown variable, follow these guide steps.Step1. Write the proportion in fraction form.

n = 10 3 15

Step2. Multiply the extremes and then the means. Note that, we use the raised dot (.) for multiplication instead of x symbol.

n = 10 3 15

Step3. Divide the left and right sides.15n = 30

means

extremes

*To prove that they are equal, cross multiply. Each has an answer of 150.

15 . n = 3 . 10

15n = 30

n = 2

15 15

To check, replace n with 2, and then cross multiply.2 = 103 15

F. GeneralizationRatios are numbers express rates. It shows the comparison of two quantities. Ratios, when equal are called Proportion. In writing Ratios, we use colon or fraction form.

IV. EvaluationA. Direction: Express the following ratios in lowest term.

1. 5:202. 12:43. 6:184. 1hour to 120minutes5. 9days to 3weeks

B. Direction: Find the value of n in each following proportions.1. n : 4 = 3 : 62. 8 : 12 = 10 : n3. 5 : n = 1 : 24. 3 : 7 = 24 : n5. n : 10 = 18 : 5

V. AssignmentIn your textbook, do answer page 132 A and B. Put your answers in your notebook.

2 . 15 = 303 . 10 = 30