स्तंभ I में दी गई गणितीय अवधारणाओं को स्तंभ II में उनके संबंधित उदाहरणों के साथ सुमेलित कीजिए: स्तंभ I (a) भ्रांति (Misconception) (b) निरूपण (Representation) (c) आकलन (Estimation) (d) तुलना (Comparison) स्तंभ II i. 4 < 5 ii. 48 × 52 = 2500 iii. 23 + 34 = 57 iv. ग्राफ या वस्तुओं के माध्यम से संख्याओं का प्रदर्शन

A mathematics teacher of Class II gives the following word problem on addition to the students: 'A bag contains 4 mangoes and 6 more mangoes are put into it. How many mangoes are there in the bag in total?' This type of word problem belongs to which of the following structures of addition?

A teacher wrote the number 308 on the blackboard and asked the children to read it aloud. A child said, 'It is thirty-eight.' Which of the following is the most appropriate strategy to rectify the error made by the child?