Students` Learning Outcomes

  • Describe the concept of unitary method.
  • Calculate the value of many objects of the same kind when the value of one of these objects is given.
  • Calculate the value of a number of same types of objects when the value of another of the same type is given (unitary method)

Information for Teachers

  • In unitary method we deal with the following:Unitary Method

o   Finding the price of more things when price of one thing is given.

o   Finding the price of 1 thing if price of more things is given.

o   Finding the price of given number of things if the price of other number of same things is given.


  • During lesson where necessary also consult textbook.

Material / Resources

Writing board, chalk / marker, duster, prepare question slips for application of unitary method, chart paper


  • Announce that today we will explore about unitary method.


Activity 1

  • Write “Unitary method” in the middle of the board.
  • Ask the class what do they know about Unitary Method?
  • Write their responses on board, appreciate closer or correct answers.
  • In the word unitary encircle unit and say that unit means one.
  • If we know the relation of one unit value with more values we can find the relation of any value with any other numbers. Write the question on the board “If 1 dollar is equal to Rs. 184” then what is the value of 10 dollars?
  • Let them think and come up with the answer 184 x 10 =1840.
  • Tell them that as we got the value of one dollar we were able to find the value of 10 dollars.
  • Tell the students that in the same way if we are given value of certain objects / things we can find the value of other number or quantity of the same object / thing.
  • Tell the students like a story;


  •  Ask students:

How many bananas I bought? [30]

How much I paid for that?   [Rs. 150]

  • To pay for 20 bananas what do I need to know? [Rate or cost of 1 banana]
  • How would I know the rate of the bananas? [By using unitary method]
  • Ask students following questions and tell them to tell you what they need to get the answer.


  • Appreciate the correct work and encourage students to give more examples of the same kind.
  • Select few questions from the textbook exercise and give as individual work to do in their notebooks. Activity 2
  • Ask volunteer students to explain in their own words telling how unitary method is used to solve the following questions;


  • Ask similar type of questions to reinforce that it`s easy to find the value of one object is given.
  • After students explain the questions refer them in pairs to the textbook selected questions to solve in their notebooks.
  • Keep roaming in the class while students are doing their work. Correct them if they make any mistake.

Activity 3

  • Divide the class into groups of 4 or 5.
  • Select one group leader and assign him / her to explain unitary method to each of your group member. (Allocate 7 minutes)
  • Working in the same groups, develop 5 questions which can be solved with unitary method.
  • Prepare questions slips; also ask them to write their group number at the back of their sheets.
  • Ask each group to take slips according to the members of the group.
  • Read the statements and identify wrong statements.
  • Solve the correct questions.
  • Paste the slips on a chart paper and display in classroom.
  • Turn by turn call groups and ask them to explain the work.
  • Appreciate for correct work and make corrections in wrong answers and questions.

Sum up / Conclusion

  • Lesson will be concluded by recapping following points;
  • How to find unit cost if cost of more items is given?
  • What will you do if you are given the cost of 15 items and you have to find the cost of one item?
  • State the operation done if you are given the cost of 15 items and you have to find the cost of 18 items?
  • What is the use of unitary method in daily life?


  • Call three students on the board and give them names of alphabets “A, B and C”. tell them to remember their names.
  • Allocate time 5 minutes.
  • Attempt following questions according to their alphabet.


Follow up

  • Assign practice questions from the textbook.
  • Ask them to create two story problems to be shared in the next class in which unitary method is to be applied.


Leave a Comment