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

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

Question 1. 8 × 4 = ____
Answer: \( 8 \times 4 = 32 \). When you multiply 8 by 4, you get the product 32. This is a basic multiplication fact.
In simple words: Eight multiplied by four is thirty-two.

🎯 Exam Tip: Always practice your multiplication tables regularly; knowing them by heart helps you solve problems quickly.

Question 2. 8 × 6 = ____
Answer: \( 8 \times 6 = 48 \). The product of 8 and 6 is 48. Multiplication is a fundamental math operation.
In simple words: Eight times six is forty-eight.

🎯 Exam Tip: You can think of \( 8 \times 6 \) as \( (8 \times 5) + 8 \) or \( (8 \times 3) \times 2 \) if you forget the exact product.

Question 3. 8 × 10 = ____
Answer: \( 8 \times 10 = 80 \). Multiplying any number by 10 usually means adding a zero to the end of that number. This is a helpful shortcut for tens.
In simple words: Eight multiplied by ten gives eighty.

🎯 Exam Tip: When multiplying by 10, simply write the original number and add a zero to the right side of it.

Question 4. One packet contains 8 pencils, how many pencils are there in 9 such packets?
Answer:
Number of pencils in one packet = 8
Number of such packets = 9
Total number of pencils = Number of pencils in one packet \( \times \) Number of packets
Total number of pencils = \( 8 \times 9 \)
Total number of pencils = 72 pencils. To find the total, you simply multiply the number of items per group by the number of groups.
In simple words: If one packet has 8 pencils, then 9 packets will have 72 pencils in total.

🎯 Exam Tip: For "how many in total" questions, multiplication is usually the operation to use, especially when you have equal groups.

Question 5. The price of one ball is Rs 10. Find the cost of 8 such balls?
Answer:
Cost of 1 ball = Rs 10
Cost of 8 balls = Cost of 1 ball \( \times \) Number of balls
Cost of 8 balls = \( 10 \times 8 \)
Cost of 8 balls = Rs 80. When many items cost the same, you multiply the unit cost by the quantity to find the total cost.
In simple words: One ball costs Rs 10, so eight balls will cost Rs 80.

🎯 Exam Tip: Always remember to write the correct currency symbol (like Rs) with your final answer when dealing with money problems.

Question. Complete the 9th table:
Answer:
\( 9 = 9 \times 1 = 9 \)
\( 9+9 = 9 \times 2 = 18 \)
\( 9+9+9 = 9 \times 3 = 27 \)
\( 9+9+9+9 = 9 \times 4 = 36 \)
\( 9+9+9+9+9 = 9 \times 5 = 45 \)
\( 9+9+9+9+9+9 = 9 \times 6 = 54 \)
\( 9+9+9+9+9+9+9 = 9 \times 7 = 63 \)
\( 9+9+9+9+9+9+9+9 = 9 \times 8 = 72 \)
\( 9+9+9+9+9+9+9+9+9 = 9 \times 9 = 81 \)
\( 9+9+9+9+9+9+9+9+9+9 = 9 \times 10 = 90 \)
Here is the full 9 times table:

🎯 Exam Tip: Knowing your multiplication tables helps with many areas of math, including division, fractions, and algebra. Practice them daily!