# Lesson Plan of Subtract Units of Time

## Students` Learning Outcomes

• Subtract units of time in hours.
• Solve real life problems involving subtraction of units of time in hours.

### Information for Teachers

• Units of time are used to measure the duration between the occurrences of two events. • The smallest unit of time is second.
• The other units of time are minute, hour, day, week, month, and year. Time unit hour can be subtracted from hours.

• While teaching the lesson, also consult textbook where and when applicable.

### Material / Resources

Writing board, chalk/marker, duster, pointer/stick, textbook

### Introduction

• How many hours are in one day?
• If you spend 6 hours each day in school then how many hours do you spend on other activities?
• Explain the subtraction procedure on the board. ### Development

Activity 1

• Write the following statements on the board and then ask questions.
• Maroon and his wife reached Islam Abad from Lahore in 8 hours by train and taxi. They travelled two hours by taxi. How long did they travel by train? • Zara finished her homework in three hours. She completed Math`s work in one hour. How much time could she spare for rest of the homework? Activity 2

• Ask students to find the difference between the following pairs of time: ### Sum up / Conclusion

• Among hours, minutes and seconds, hour is the biggest unit of time. Hours can be subtracted from hours through simple mathematical subtraction process.

### Assessment

• Akram slept only 4 hours yesterday night. How much time he remained busy during the whole day?