While Teaching some boys did not follow the concept - Defects noticed When asked The kids should understand the reasoning and logic to solve arithmetic problems I asked the child the following question. The cost of 1 mango is Rupees 5, what would be the cost of 10 mangoes = 5 Multiplied by 10 = Rs. 50 The cost of 10 mangoes is Rs. 50, what would be the cost of 1 mango = 50/ 10 = Rs. 5 If you give the shopkeeper Rs. 20, and purchased 3 mangoes that what is balance amount you would get back? 3 x 5 = 15, 20 – 15 = Rs. 5. Cost of 1 mango is Rs. 5, and cost of one apple is Rs.15, what would be the cost of both Now add 5 + 15 = Rs. 20 This when explained a kid did not understand. So the next step to make the child understand this was to Show the mangoes, apple and Rupees. It was given a note book and a pencil. Now asked to calculate This using Rs. 5 coins for each transaction. On this experiment the kid under stood this concept. Hence it he was as...