# Mathematics Guides JSS 1 Basic Operations – Addition and Subtraction of Whole Numbers | Addition, Subtraction, Multiplication and Division of Fractions | Addition, Subtraction and Multiplication of Numbers in Base 2 | Approximation and Estimation

**MATHEMATICS **

**THEME – BASIC OPERATIONS **

**TOPIC 1 – ADDITION AND SUBTRACTION**

**INSTRUCTIONAL MATERIALS**

Charts/flash cards, number line chart, Bank statement of account, thermometer, etc.

**LEARNING OBJECTIVES **

By the end of the lesson, students should be able to:

1. add and subtract any given numbers correctly.

2. state the place value of each numbers in the sum or difference.

3. draw and use number line to illustrate directed numbers.

4. add and subtract positive and negative integers correctly on the number line.

5. interpret and relate positive and negative numbers to everyday activities.

**CONTENTS OF THE LESSON**

**FOCUS LESSONS **

1. Addition and subtraction of numbers and place values.

2. Use of number line.

3. Addition and subtraction of positive and negative integers.

4 Everyday application of positive and negative integers.

**LESSON PRESENTATION **

Teacher’s Activities,1. Leads students to add and subtract any two numbers up to 4 digits.

2. Leads students to state the place value of each number in the sum or difference.

3. Guides students to use number line to illustrate directed numbers.

4. Guides students to perform the operation of addition and subtraction of positive and negative integers on the number line.

5. Demonstrates the applications of positive and negative integers by:

- Walking forward and backward.

- Walking up and down stairs.

- Reading temperatures above and below zero.

- Using banking deposits and withdrawals, etc.

Student’s Activities,1. Add and subtract any two numbers up to 4 digits and state the place value of the result.

2. Solve problems involving addition and subtraction of 4 digit numbers.

4. Perform the operation of addition and subtraction of integers on the number line.

5. Demonstrate the use of number line.

6. Solve related problems on directed numbers.

**LESSON EVALUATION**

Students to,

1. add and subtract any two given numbers of not more than 4 digits.

2. state the place value of each of the sum or difference number in the sum.

3. draw numbers line and locate numbers on the number line.

4. add and subtract positive and negative integers on the numbers line.

5. record the thermometer reading at intervals of time and different condition.

6. walk forward and backward at specified time and relate the results to the number line.

**MATHEMATICS **

**THEME – BASIC OPERATIONS **

**TOPIC 2 – ADDITION AND SUBTRACTION OF FRACTIONS**

**INSTRUCTIONAL MATERIALS**

Fraction charts.

**LEARNING OBJECTIVES **

By the end of the lesson, students should be able to:

1. solve given problems on addition and subtraction of fractions.

2. solve word problems involving addition and subtraction of fractions.

**CONTENTS OF THE LESSON**

**FOCUS LESSONS **

1..Addition and subtraction of fractions.

2. Word problems on addition and subtraction of fractions.

**LESSON PRESENTATION**

Teacher’s Activities,1. Guides the students to add and subtract fractions using diagrams and calculation.

2. Guides the students to add and subtract fractions with different denominators using diagrams and calculation.

3. Guides the students to add and subtract fractions with mixed numbers.

4. Guide the students to recognize and solve combined addition and subtraction of fraction problems.

5. Guide the students to interpret and solve word problems.

Student’s Activities,1. Add and subtract fractions using diagrams and calculation.

2. Add and subtract fractions with different denominators using diagrams and calculation.

3. Add and subtract fractions with mixed numbers.

4. Solve combined addition and subtraction of fraction problems.

5. Interpret and solve word problems on combined addition and subtraction of fractions.

**LESSON EVALUATION**

Students to,

1. add and subtract fractions with the same denominators.

2. add and subtract fractions with different denominators.

3. add and subtract fractions with mixed numbers.

4. solve combined addition and subtraction of fraction problems.

5. solve word problems on addition and subtraction of fractions.

**MATHEMATICS **

**THEME – BASIC OPERATIONS **

**TOPIC 3 – MULTIPLICATION AND DIVISION OF FRACTIONS**

**INSTRUCTIONAL MATERIALS**

Flash cards.

**LEARNING OBJECTIVES **

By the end of the lesson, students should be able to:

1. solve problems on multiplication of fractions.

2. solve problems on division of fractions.

3. solve word problems involving multiplication and division of fractions.

**CONTENTS OF THE LESSON**

**FOCUS LESSONS **

1. Multiplication of fractions.

2. Division of fractions.

3. Word problems involving multiplication and division of fractions.

**LESSON PRESENTATION**

Teacher’s Activities,1. Multiply and divide fractions using diagrams.

2. Multiply and divide fractions by direct calculation.

3. Multiply and divide mixed numbers by direct calculation.

4. Interpret and solve word problems involving multiplication and division of fractions.

Student’s Activities,1. Multiply and divide fractions using diagrams.

2. Multiply and divide fractions by direct calculation.

3. Multiply and divide mixed numbers by direct calculation.

4. Interpret and solve word problems involving multiplication and division of fractions.

**LESSON EVALUATION**

Students to,

1. Multiply and divide given fractions using diagrams.

2. Multiply and divide the given fractions by direct calculation.

3. Multiply and divide mixed numbers by direct calculation.

4. Interpret and solve word problems involving multiplication and division of fractions.

**MATHEMATICS **

**THEME – BASIC OPERATIONS **

**TOPIC 4 – ADDITION, SUBTRACTION AND MULTIPLICATION OF NUMBERS IN BASE 2 NUMERALS**

**INSTRUCTIONAL MATERIALS**

Counters and Sum cards.

**LEARNING OBJECTIVES **

By the end of the lesson, students should be able to

1. convert binary numbers to base 10 numerals.

2. convert base 10 numerals to binary numbers.

3. add, multiple and multiple two or three 3-digits binary numbers.

**CONTENTS OF THE LESSON**

**FOCUS LESSONS **

1. Convert binary numbers to base 10 numerals.

2. Convert base 10 numerals to binary numbers.

3. Addition of two or three 3-digits binary numbers.

4. Subtraction of two or three 3-digits binary numbers.

5. Multiplication of two or three 3-digits binary numbers.

**LESSON PRESENTATION**

Teacher’s Activities,1. Guides students to convert binary numbers to base 10 numerals and convert base 10 numerals to binary numbers.

2. Guides students to add, subtract and multiple two or three 3-digit numbers in base 2.

Student’s Activities,1. Convert binary numbers to base 10 numerals and convert base 10 numerals to binary numbers.

2. Do Addition, subtraction and multiplication of simple two or three 3-digits binary numbers.

**LESSON EVALUATION**

Students to,

1. convert binary numbers to base 10 numerals.

2. convert base 10 numerals to binary numbers.

3. add, subtract and multiplication two or three numbers involving two or three 3-digit numbers.

**MATHEMATICS **

**THEME – BASIC OPERATIONS **

**TOPIC 5 – APPROXIMATION**

**INSTRUCTIONAL MATERIALS**

1. Addition and subtraction approximation charts.

2. Multiplication and division approximation charts.

3. Rounding off number chart.

**LEARNING OBJECTIVES **

By the end of the lesson, students should be able to:

1. approximate answers to addition and subtraction problems to a given degree of accuracy.

2. approximate answers to multiplication and division problems to a given degree of accuracy.

3. rounding numbers to the nearest 10, 100, and 1000.

4. apply approximation involving basic operations in everyday life activities.

5. solve problems on quantitative reasoning in the above contents.

**CONTENTS OF THE LESSON**

**FOCUS LESSONS **

1. Approximating values of addition and subtraction.

2. Approximating results of multiplication and division.

3. Rounding off numbers to the nearest 10, 100, and 1000.

4. Application of approximation in everyday life.

5. Quantitative reasoning.

**LESSON PRESENTATION**

Teacher’s Activities,1. Leads students to approximate answers to given addition and subtraction problems.

2. Guides students to compare the actual answers with the approximated ones.

3. Guides students to approximate answers to multiplication and division problems.

4. Leads students to round off given numbers to the nearest 10, 100, and 1000.

5. Solve real life problems involving approximation.

6. Leads students to solve problems on quantitative reasoning in the above contents.

Student’s Activities,1. Carry out approximation of answers to given addition and subtraction problems.

2. Carry out the actual addition and subtraction and compare the answers with the approximated ones.

3. Carry out approximation on multiplication and division problems.L

4. Carry out the actual multiplication and division and compare the actual and approximated values.

5. Round off given numbers to the nearest 10, 100, and 1000.

6. Solve problems involving approximation of things in everyday activities.

7. Solve problems on quantitative reasoning in the above contents.

**LESSON EVALUATION**

Students to,

1. appropriate answers to given addition and subtraction problems.

2. appropriate answers to given multiplication and division problems.

3. round off given numbers to the nearest 10, 100, and 100.

4. solve given problems on quantitative reasoning in the above contents.

5. solve problems on qualitative reasoning.

**MATHEMATICS **

**THEME – BASIC OPERATIONS **

**TOPIC 6 – ESTIMATION**

**INSTRUCTIONAL MATERIALS**

Desks, tables, classrooms, footpaths, books, school bags, containers, milktins, solid objects, etc.

**LEARNING OBJECTIVES **

By the end of the lesson, students should be able to:

1. estimate the dimensions and distances within the school.

2. estimate the capacity and mass of given objects.

3. estimate other things in day to day activities.

4. solve problems on quantitative reasoning in estimation.

**CONTENTS OF THE LESSON**

**FOCUS LESSONS **

1. Estimation of dimensions and distances.

2. Estimation of capacity and mass of objects.

3. Estimation of other things eg age, time, etc.

4. Quantitative reasoning involving estimation.

**LESSON PRESENTATION **

Teacher’s Activities,1. Leads students to identify objects in the classroom and school environment and the dimensions that can be estimated.

2. Guides students to estimate some distances and dimensions.

3. Leads students to estimate the capacity of given objects.

4. Guides students to estimate the mass of given objects.

5. Guides students to estimate things in day to day activities.

6. Leads students to solve problems on quantitative reasoning in estimation.

Student’s Activities,1. Identify objects in the classroom and school environment and the dimensions that can be estimated.

2. Estimate some distances and dimensions.

3. Estimate the capacity of some containers eg milk tins.

4. Estimate the mass of given objects.

5. Guides students to estimate things in day to day activities.

6. Solve problems on quantitative reasoning in estimation.

**LESSON EVALUATION**

Students to,

1. estimate the lengths and widths of the classroom.

2. estimate the distance between the classroom and the principal’s office.

3. estimate the capacity of given objects.

4. estimate the quantitative values of other things in day -to- day life.

5. solve problems on quantitative reasoning in estimation.