1. To begin with the topic Subtraction, teacher will first recapitulate the concept of subtraction that students studied in their previous class. Teacher will explain that subtraction means taking one number away from another OR to take away from a group or a number of things to find how much is left, this is called subtraction. For example,
15 - 5 = 10, where minus (-) is the sign of subtraction. Result of subtraction is called difference. 

2. For better understanding of the concept of subtraction a video (extramarks module) will be shown and students will be asked to listen carefully. 

3. To explain the connection of addition and Subtraction, the students were taught to check Subtraction with addition by showing addition first. 
For example, 5 books + 6 books = 11 books, leading to a family of 5, 6 and 11. The students will be shown the usefulness of number family as if 11 - 5 = ______, the missing number of the family is 6, so the answer is 6. 

