Lesson Plan of Addition of Units of Length

Lesson Plan of Addition of Units of Length

Subject Mathematics

Grade III

Students` Learning Outcomes

  • Add measures of length in same units with and without carrying.
  • Solve real life problems involving same units of length for addition with and without carrying.

Information for Teachers

  • In addition of lengths, centimeters are added into centimeters, meters into meters and kilometers into kilometers.

  • If the addition of centimeters exceeds 100, then number of meters so obtained is added into meters e.g.

Addition of Units of Length

  • If the addition of meters exceeds 1000, then number of kilometers so obtained is added into kilometers, e.g.

Addition of Units of Length

  • Question should be written vertically under column headings (km, m, and cm).
  • Sign of addition “+” should not be written under any column heading.
  • While teaching the lesson, also consult textbook where and when applicable.

Material / Resources

Writing board, chalk/marker, duster, meter rod, measuring tape, paper strips, textbook

Introduction

  • Give two paper strips of different lengths (m, cm) to each student.

Addition of Units of Length

  • Ask them to measure their length and write the measurements on notebook.

Addition of Units of Length

  • Ask them to add the lengths of the 2 strips.

Addition of Units of Length

Development

Activity 1

  • Ask the students to sit in pairs.
  • Ask them to think of estimate of their heights.
  • Call one of the pairs and ask to write their height on board under column heading.
  • Addition of Units of Length
  • Now ask them to add their height on board.
  • We add “cm” into “cm” and “m” into “m”.

Addition of Units of Length

  • Ask the students to note down this question in their notebook.
  • Call two or three pairs to repeat this activity.

Activity 2

  • Draw and write the following on the board or chart.

Addition of Units of Length

  • How much distance does Ali cover from home to school and school to Razz’s home?
  • Call one of the students and ask him to write the units of length on board which is used in this statement. (Km and m).
  • Ask from another student, “How much distance does Ali cover from home to school?” (5km 800m)
  • Write 5km 800m under units heading on board.

Addition of Units of Length

  • Ask from third student, “How much distance does Ali cover from school to Razz`s home? (4km 250m)
  • Write 4km 250m below first value on board.

Addition of Units of Length

  • Tell them to find the total distance; we will add “m” and “km” into “km”.
  • Ask the students to add the meters.
  • Tell them as the number of meters exceeds 1000 e.g. 1050m = 1km + 50m.
  • So we write 50 below meters and carry 1km to kilometers columns.
  • Add kilometers; 5km + 4km + 1km =10km

Addition of Units of Length

Activity 3

  • Ask the students to solve the following sums in their notebook.

Addition of Units of Length

  • Tell them, if the number of centimeters exceeds 100 then number of meters obtained is added into meters and if the number of kilometers obtained is added into kilometers.

Addition of Units of Length

  • Observe their work and guide them where necessary.
  • Revise the relation between “cm”, “m” and “km” by asking from students.

Sum up / Conclusion

  • Centimeters are added into centimeters, meters into meters and kilometers into kilometers.
  • If the centimeters are 100 or more than 100, we carry the meters to the meters column.
  • Similarly if the meters are 1000 or more than 1000, we carry the kilometers to the kilometers column.
  • Question should be written vertically under column headings.

Addition of Units of Length

Assessment

  • Ask the students to solve the following sums:
  • A boy has two pieces of string of the lengths 47m 35cm and 57m 85cm. find the total length of two strings.

Addition of Units of Length

  • How much distance Ahsan cover daily from home to mosque, mosque to school and school to home?

Addition of Units of Length

Addition of Units of Length

Follow up

  • Measure the heights of your family members and find the total height of them. Solve it in notebook.
  • Ask the students to solve the questions given in the textbook.

Leave a Comment