**LESSON PLAN**

** **

** **School Unit : SMP N 1 Boyolali

Subject : Mathematics

Grade / Semester : VII / 1

Standar Competency : 1. Numbers

To Understand operation of numbers and use to problem solving.

Basic competency : 1.1. Doing operation in Integers and Fractions

Indicators : 1.1.1. Mentioning examples of Integers

1.1.2. Expressing measurement in daily use negative numbers

1.1.3. Determining location of Integers in numbers line

1.1.4. Doing Additions, Substraction, Multiplication, Devisions, and powers of Integers

1.1.5. Finding properties of addition and multiplication of Integers

Time Allocation : 14 x 40 minutes (7 meetings)

**A.** **Learning Purpose**

1. Student able to mentioning examples of integers

2. Student able to expressing measurement in daily use negative numbers

3. Student able to determining location of Integers in numbers line

4. Student able to doing Additions, Substraction, Multiplication, Devisions, and powers of Integers

5. Student able to find properties of addition and multiplication of Integers

**B. Main Concept**

Chapter 1: Integers and Fraction

1.1. Integers and theirs symbols

1.2. Additions and theirs properties

1.3. Substraction of integers

1.4. Multiplication and theirs properties

1.5. Divisions of Integers

1.6. The Least Common Multiple (LCM) and The Greatest Common Devisor (GCD)

1.7. Estimation on Integers

1.8. Exponentiation of Integers

1.9. Square roots of Integers

1.10.Cube roots of Integers

**C. Instructional Process**

1. Learning Approach : Contextual

2. Methods : a. Orally

b. Expository

c. Drill

d. Interactive

**D. Teaching and Learning Activity**

1. First Meeting (2x 40 minutes)

a. Introduction

Apperception :

· Teacher give examples in daily to use negative or positive, such as temperature, elevations of the earth’s and so on

Motivation

· Teacher give some special properties of arithmetical operation on integersand fraction, such as 111.111 x 111.111 = 12345654321

b. Main activity

· Give an example integers and way of written

· Give examples relationship between two integers and determine location of number in number line

· Given exercise and student doing with their friends

· Some student show their work in front of class

· Teacher checks the others

c. Closing Activity

· Teacher and student make conclusion

· Teacher give homework and asking student make “manik-manik bilangan” and “Number line”

2. Second Meeting (2 x 40 minutes)

a. Introduction

Apperception

· Discuss homework

· Some student shows their work in front of class

· Teacher checks the others

Motivation

· Teacher give purpuse of learning to day

b. Main activity

· Formed group consist of 4 students

· Give rule of adding by “manik-manik bilangan” and “number line”

· Give exercise and student work with their group

· Some group presentation in front of class and the others answering to the presentation

c. Closing Activity

· Make conclusion

· Give homework

3. Third Meeting (2 x 40 minutes)

a. Introduction

Apperception and Motivation

· Discuss homework

· Give target of learning to day

b. Main Activity

· Give examples how operating subtraction by line numbers

· Give examples operating multiplication on Integers

· Given exercise and student work with friend one table

· Some student shows their work in front of class

· Teacher check the others

c. Closing Activity

· Make conclusion

· Give homework

4. Fourth Meeting (2 x 40 minutes)

a. Introduction

Apperception and Motivation

· Discuss homework

· Some student shows their work in front of class and teacher check the others

· Give target of learning to day

b. Main activity

· Studying properties multiplication of integers

· Give examples division of Integers

· Given exercise and student work with their friend one table

· Some student show their work in front of class and teacher check the others

c. Closing Activity

· Make conclusion

· Give homework

5. Fifth Meeting (2 x 40 minutes)

a. Introduction

Apperception and Motivation

· Remember again about LCM and GCD by factoring

· Give the target of learning to day

b. Main Activity

· Studying about LCM and GCD

· Given examples estimation on Integers

· Given exercise about LCM, GCD and Estimation of integers, student work with their group

· Teacher assisting group experiencing of difficulty

· Some group presentation in front of class and the others answering to the presentation

c. Closing Activity

· Make conclusion

· Given homework

6. Sixth Meeting (2 x 40 minutes)

a. Introduction

Apperception and Motivation

· Discuss homework

· Remember again about multiplication

· Given target of learning to day

b. Main Activity

· Given examples exponentiation of integers

· Given properties of exponentiation : multiplication of powers, divisions of powers and raising a power to a power

· Given exercise and student work with their group

· Teacher assisting group experiencing of difficulty

· Some group presentation in front of class and the others answering to the presentation

c. Closing Activity

· Make conclusion

· Give homework

7. Seventh Meeting ( 2 x 40 minutes)

a. Introduction

Apperception and Motivation

· Discuss homework

· Remember again about exponentiation of integer

· Given target of learning to day

b. Main Activity

· Given examples calculating the square root of and cube of integers

· Given examples finding the square of number by estimation

· Given exercise about square root of, cube of and the square root of number by estimation

· Student work with their group

· Some group presentation in front of class and the others answering to the presentation

c. Closing Activity

· Make conclusion

· Give homework

**E. Reference**

1. Sources : Student books, worksheet

2. Medias : Celcius thermometers

** **

**F. Assignment**

** **a. Technique : Write test

b. Instruments Expression : Essay

c. Instrument :

1. Use a number line to do the following additions and subtractions!

a. 7 + (-2) c. 6 – 9

b. (-4) + (-9) d. -7 – (-4)

2. In a test consisting of 50 questions, each correct answer is rated 3, each incorrect answer is rated – 1, and the question which are left unanswered are rated 0. In the test Andi answered correctly 34 questions and did not answer 4 questions. What was the total score Andi’s got?

3. Do the following expressions!

a. 13 – 7 + (-3) – (-4) c. (-6 x 16) : (-12)

b. (-96 : -8) : 3

4. Find the GCD and LCM of each pair numbers below!

a. 14, 42 and 70 b. 84, 126 and 168

5. Simplify the expressions below!

a. <!–[if supportFields]> QUOTE <![endif]–><!–[if supportFields]><![endif]–> b. <!–[if supportFields]> QUOTE <![endif]–><!–[if supportFields]><![endif]–>

Boyolali, Juli 2010

Aprivide By Principal Mathematics Teacher

Drs. H. Samsudin, M.Pd. Ratnawati Fatriyah.

NIP 19621115 199903 1 011 NIm A 410 070 103