SEMI-DETAILED LESSON PLAN IN MATH 5

SEMI-DETAILED LESSON PLAN IN MATH 5

I.              Objective

To solve word problems involving percentage, rate and base.

II.            Learning Content:

A.   Topic: Solving word problems involving percentage, rate and base.

B.   Reference: Gatbagan, Erlinda E. et al. Maths for Meaningful Lives. Book crafts Publishiing Co. IncMotiva. 2003. Pg. 261-265

C.   Matriels: letter board, charts, manila paper

III.           Learning Experience

A.   Preparatory Activities

1.        Drill

Finding the missing term.

Choose A if the missing term is Rate; B if Base and C if percentage.

1.    55% of 125 is _____.

2.    9 is ____ % of 115.

3.    23 is what percent of 115?

4.    12 % of ____ is 6

5.    25 % of ____ is 40.

2.      Review

Solve for the missing terms

·         55% of 125 is _____.

·         9 is ____ % of 115.

B.   Developmental Activities

1.    Motivation

Show a picture of a tiangge.

Ask the students:

Have you been on this place?

Why do people love to shop on tiangge?

2.    Presentation of the Lesson

Let’s see some of the buyer’s problem while they are on a store.

a . A shirt worth 600 php is on sale at 360 php. What percent is the shirt on sale?

Ask:

·         What is asked in the problem?

(The percent of the shirt on sale.)

·         What are the given information or data that can help us solve the problem?

(original price= 600 php ; discounted price= 360 php)

·         What is the formula to be used?

(R=P/B x 100)

·         What is the solution on the given equation?

R = 360 / 600

 R = 0.6 x 100

 R = 60 %

( The shirt was 60 % on sale)

b.    In a department store, 60% of the employees are men. If there are 27 men in the store, how many employees are there all?

Ask:

·         What is asked in the problem?

( The total number of employees in a store)

·         What are the given information or data that can help us solve the problem?

( rate of men  = 60 % ; total number of men = 27)

·         What is the formula to be used?

( B= P/R)

·         What is the solution on the given equation?

B= P/R

B= 27 / 0.60

B= 45

( The total number of employees is 45)

c.    During the Book Week, 20 % of the 50 students of Miss Lopez went to Maliwanag Bookstore. How many students went to the Bookstore?

Ask:

·         What is asked in the problem?

( The number of students who went to the bookstore)

·         What are the given information or data that can help us solve the problem?

( rate of students who went To the book store = 20 % ; Total number of students = 50)

·         What is the formula to be used?

( P = B x R

  P = 50 x 0.20

P = 30

( The number of students who went to Bookstore is 30)

3.    Fixing Skills

1.    A group of students went tree planting last year. They planted 650 mango trees. Of these trees, 130 died. What percent of the trees died?

A.   Application

(Group Work)

Solve the following.

·         During a basketball tournament, a team scored 120 ppints. Don scored 30 % of the points. How many points did he score?

·         25 % of the class of 40 pupils got a s core of 35 and above. How many students score 35  and above?

4.    Generalization:

What are the steps in solving word problems ?

IV.          Evaluation

Solve the following word problems:

A.   Rosemarie spelled 68 words correctly out of 80. What percent of the words did she spell correctly?

B.   There are 10 new pupils in  Mrs.Lira’s class. If this is the 5 % of the whole class, what is the total number of Mrs. Lira’s pupils?

V.           Assignment:

Solve word problem:

A.   On a Super Sale tiangge, a purple sweater is 25 % off of its original price which costs 160 php. How much will Tina pay for the sweater?

Philippine Normal University

The National Center for Teacher Education

College of Education

Department of Field Study and Practice Teaching

Taft Avenue Manila

Semi-Detailed Lesson Plan in Math 5

Solving Word Problems

 Involving Rate, Percentage and Base

Prepared by

Allma V. Reynaldo

Student Teacher

Submitted to:

Mr. Luis Salenga

Cooperating Teacher

Paranaque Elementary School- Central