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126 Arrow-Puffin-4_Semester-1 MathsII. Arrange the given numbers vertically and add.a. 2,305; 1,327; 4,013 b. 2,337; 192; 2,321 c. 1,881; 188; 1,188d. 4,217; 214; 1,247 e. 3,307; 632; 48 f. 5,361; 120; 1,421g. 1,383; 382; 75 h. 2,550; 250; 1,350 Do the following story problems.1. After a fire, there were only 2,078 trees left in the forest. One year later 4,785 saplings were grown. How many trees are there in the forest now?2. After a natural disaster, a garment factory helped by donating 2,764 shirts, 5,853 pairs of pants and 3,435 sarees. How many pieces of clothing did the company donate?3. The population of a small town was 10,352. After 3 years it grew by 8,375. What is the total population of the town after three years?ESTIMATION OF SUMWe round off the numbers to estimate the sum.Example : Estimate the sum of 4,217 and 8,926.Solution : 4,217 rounded off to the nearest thousand = 4000 8,926 rounded off to the nearest thousand = 9000 The estimated sum of 4,217 and 8,926 is = 13,000The actual sum of 4,217 and 8,926 is Th H T O4 2 1 7+ 8 9 2 61 3 1 4 313,143. Estimate the sum of the following numbers.1) 4217 + 3096 2) 7038 + 6926 3) 8409 + 19084) 3026 + 5936 5) 6131 + 2806 6) 4217 + 3818 Let's Practise 3.7 ApplicationLet's Understand Conceptual UnderstandingAddition of two or more umbers in any order gives the same value. 428 + 317 = 317 + 428 = 745Maths in Real Life Case Study Based Questions