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
