LESSON LOG IN GENERAL MATHEMATICS
Date September 24, 2019
Topic Simple Interest
At the end of the lesson, the students are expected to:
1. define simple interest;
Objective/s
2. compute simple interest, maturity value and unknown principal, rate or time;
3. solve real-life problems involving simple interest.
Laptop, LCD Projector, visual aids, manila paper, marker and activity Allotted
Materials
sheets Time
General Mathematics for Senior High School by Checking of 2
Oronce (pp. 186 – 195) Attendance minutes
Reference/s
http://handsonmath.blogspot.com/2011/03/teaching 3
Review
-simple-interest-choosing-best.html minutes
Teacher’s 5
pp. 156 – 162 Motivation
Guide minutes
Learner’s Presentation 40
pp. 137 – 143
Manual of Lesson minutes
Divide the class into three groups. Let them watch the video
showing a story about a guy who wants to borrow $70.00. He has three
choices to borrow the money; “his mom and dad”, “the bank”, or “the
loan shark Larry”. Instruct the learners to answer the following
questions while watching the video:
1. How much does the guy want to borrow?
2. What are his choices to borrow the money from? 15
Activity
3. How much does the kid will pay monthly if he borrows the money to minutes
his mom and dad? to the bank? and to the loan shark Larry?
4. Where does the kid borrow the money?
5. If you were the kid, where will you borrow the money? Why?
After watching the video, let them write their answers in a manila
paper and post it on the board. Ask the learners to choose their
discussant to present their group work.
1.How did you find the activity? Was it easy or difficult?
2.How did you answer it?
10
Analysis 3.What difficulties did you encountered in answering the question?
minutes
4.What did you learn from this activity?
5.How will you compute simple interest?
Simple interest (I S ) is an interest that is computed on the principal
and then added to it
An annual simple interest is based on the 3 factors:
a. Principal which is the amount invested or borrowed;
b. Simple interest rate, usually expressed in percent; and
c. Time or term of loan, in years.
To compute the unknown simple interest, principal, rate or time, the
following formulas are used
Is Is Is 10
Abstraction I s=Prt P= r= t= minutes
rt Pt Pr
where I s=¿ simple interest, P=¿ Principal, r=¿ rate, t=¿
time or term in years
To find the future value or maturity value, simply add interest to the
principal.
F=P+ I s or F=P(1+rt)
where F=¿ maturity (future) value, I s=¿ simple interest,
P=¿ Principal, r=¿ rate, t=¿ time or term in years
1. Compute the unknown principal, rate, time, interest and future value
by completing the table.
Principal Rate Time Interest Future Value
₱10 000 8% 15 (a) (b)
(c) 2% 5 ₱10 000 (d)
₱360 000 (e) 2 ₱3 600 (f)
₱175
₱500 000 10.5% (g) (h) 5
Application 500
minutes
2. Solve the following problems on simple interest.
(i) What are the amounts of interest and future value of a loan for
₱150 000 at 6.5% simple interest for 3 years?
(j) In order to have ₱200 000 in 3 years, how much should you
invest if the simple interest is 5.5%?
(k) How long will ₱40 000 amount to ₱51 200 if the simple interest
rate is at 12% per annum?
Compute the unknown principal, rate, time, interest and future
value by completing the table.
Principal Rate Time Interest Future Value
₱60 000 4% 15 (1) (2)
(3) 12% 5 ₱15 000 (4) 8
Evaluation
₱50 000 (5) 2 (6) ₱59 500 minutes
₱157
(7) 10.5% (8) ₱457 500
500
₱1 000 000 0.25% 6.5 (9) (10)
Mathematical Journal
2
Assignment How long does it take for ₱500 000 to double at 6% using simple
minutes
interest?
60 –
Total
Remarks number
of
minutes
Score Score
10 5
9 4
8 3
7 2
6 1
0
Total
Prepared by:
NECILYN B. ANGELES
Master Teacher II
Checked by:
MERDEKA L. ESMALDE
Master Teacher II
Noted:
EVA MARIE S. CAMBE
PSDS/OIC-Principal
