Samacheer Kalvi Class 4 Maths Solutions Term 1 Chapter 2 Numbers Exercise 2.4

Tamilnadu Samacheer Kalvi 4th Maths Solutions Term 1 Chapter 2 Numbers Ex 2.4

Question 1. Write the following numbers in ascending order.
(a) 7631, 9987, 7634, 5436, 8918
Answer: To arrange numbers in ascending order, we place them from the smallest to the largest. For the given numbers (7631, 9987, 7634, 5436, 8918), the correct ascending order is 5436, 7631, 7634, 8918, 9987. This helps us quickly see which number is bigger or smaller.
In simple words: We line up numbers from the smallest to the biggest. The smallest number comes first, and the largest number comes last.

🎯 Exam Tip: When comparing numbers with the same number of digits, always start comparing from the leftmost digit.

Question 1. (b) 4096, 3096, 3099, 2473, 3172
Answer: To arrange these numbers in ascending order (from smallest to largest), we compare them. Starting with 2473 as the smallest, followed by 3096, 3099, 3172, and finally 4096. Thus, the ascending order is 2473, 3096, 3099, 3172, 4096. This sequence makes it easy to identify the range of values.
In simple words: We put the numbers in order, starting with the very smallest one and ending with the very biggest one.

🎯 Exam Tip: Pay close attention to the hundreds and tens digits when numbers share the same thousands digit to ensure correct ordering.

Question 1. (c) 5201, 5627, 4325, 9999, 9801
Answer: Arranging the numbers 5201, 5627, 4325, 9999, 9801 in ascending order means listing them from the smallest value to the largest. After comparing them, the correct ascending order is 4325, 5201, 5627, 9801, 9999. This allows for a clear progression from lower to higher numerical values.
In simple words: When we put these numbers in order from smallest to biggest, we get 4325 first, and 9999 last.

🎯 Exam Tip: Double-check your list after ordering to ensure no number has been accidentally misplaced.

Question 2. Write the following numbers in descending order.
(a) 3435, 3670, 139, 3267, 6544.
Answer: To write numbers in descending order, we arrange them from the largest value to the smallest value. For the given set of numbers (3435, 3670, 139, 3267, 6544), the descending order is 6544, 3670, 3435, 3267, 139. This order is useful for seeing the decline in values.
In simple words: We list numbers from the biggest one down to the smallest one.

🎯 Exam Tip: Be careful with numbers that have fewer digits; they are usually smaller and should come at the end in descending order.

Question 2. (b) 2785, 3605, 2782, 236, 9801.
Answer: To arrange these numbers (2785, 3605, 2782, 236, 9801) in descending order, we start with the highest value and go down to the lowest. The correct order from largest to smallest is 9801, 3605, 2785, 2782, 236. Identifying the biggest number first is key to this process.
In simple words: We put the numbers from largest to smallest. The biggest number is 9801, and the smallest is 236.

🎯 Exam Tip: Always identify the highest number first, then the next highest, and so on, to avoid errors in descending order.

Question 2. (c) 6998, 6987, 6898, 7801, 8979.
Answer: Arranging the numbers 6998, 6987, 6898, 7801, 8979 in descending order means listing them from the largest to the smallest. The correct descending sequence is 8979, 7801, 6998, 6987, 6898. This shows a clear decrease in numerical value from left to right.
In simple words: We place these numbers from the biggest (8979) to the smallest (6898).

🎯 Exam Tip: When numbers have the same leading digits, carefully compare the subsequent digits to determine their exact order.

Question 3. Arrange the milestones given below in both the orders.
(a) 495 KM
(b) 0 KM
(c) 2650 KM
(d) 1680 KM
(e) 1420 KM
Answer: First, let's list the milestones and their distances: (a) 495 KM, (b) 0 KM, (c) 2650 KM, (d) 1680 KM, (e) 1420 KM. To arrange them from smallest to largest (ascending order), we compare each distance. The ascending order is: (b) 0 KM, (a) 495 KM, (e) 1420 KM, (d) 1680 KM, (c) 2650 KM. Then, to arrange them from largest to smallest (descending order), we reverse the sequence. The descending order is: (c) 2650 KM, (d) 1680 KM, (e) 1420 KM, (a) 495 KM, (b) 0 KM. This helps in understanding the distances in an organized way.
In simple words: Ascending order means going from the smallest number to the biggest number. Descending order means going from the biggest number to the smallest number.

🎯 Exam Tip: Clearly label both ascending and descending lists to avoid confusion, especially when both are requested for the same set of data.