Multiplication/Division revision and Decimal Multiplication Explanation

 

Multiplication & Division Revision Sheet

Multiplication (गुणा)

Explanation (समझाव)

Multiplication means repeated addition.
गुणा का मतलब होता है बार-बार जोड़ना।

3 × 4 = 3 + 3 + 3 + 3 = 12

Practice Sums

• 3 × 7 = ___
• 8 × 2 = ___
• 9 × 5 = ___
• 11 × 3 = ___
• 6 × 6 = ___

Division (भाग)

Explanation (समझाव)

Division means equal sharing.
भाग का मतलब होता है बराबर बांटना।

10 ÷ 2 = 5

Practice Sums

• 18 ÷ 3 = ___
• 16 ÷ 4 = ___
• 25 ÷ 5 = ___
• 30 ÷ 6 = ___
• 21 ÷ 7 = ___

Answers

• 3 × 7 = 21
• 8 × 2 = 16
• 9 × 5 = 45
• 11 × 3 = 33
• 6 × 6 = 36
• 18 ÷ 3 = 6
• 16 ÷ 4 = 4
• 25 ÷ 5 = 5
• 30 ÷ 6 = 5
• 21 ÷ 7 = 3

Decimal Number Multiplication

🔹 What is a Decimal Number?

A decimal number is a number that has a dot (.) in it.
Example: 2.5, 0.3, 4.75

Decimal number wo number hota hai jisme point (.) hota hai.

🔹 Idea of Decimal Multiplication

Multiply numbers like normal, then place decimal correctly.

Pehle normal guna karo, phir point sahi jagah lagao.

🔹 Steps

1. Ignore decimal
2. Multiply normally
3. Count decimal places
4. Put decimal in answer

1. Point ignore karo
2. Normal guna karo
3. Decimal digits count karo
4. Answer me point lagao

🔹 Examples

2.5 × 3
25 × 3 = 75
1 decimal → 7.5
Answer: 7.5
25 ka 3 se guna = 75, phir 1 decimal lagaya

1.2 × 4
12 × 4 = 48
1 decimal → 4.8
Answer: 4.8
12 ka 4 se guna = 48

0.5 × 0.2
5 × 2 = 10
2 decimals → 0.1
Answer: 0.1
2 decimal hone ke wajah se 0.1 bana

3.4 × 2.1
34 × 21 = 714
2 decimals → 7.14
Answer: 7.14
34 ka 21 se guna = 714

🔹 Practice Questions

1. 2.3 × 2
2. 1.5 × 3
3. 0.4 × 5
4. 2.2 × 1.1
5. 0.6 × 0.3

Answers:
1. 4.6
2. 4.5
3. 2.0
4. 2.42
5. 0.18

🔹 Daily Life Example

1 chocolate = ₹2.5
3 chocolates = 7.5

Agar ek chocolate ₹2.5 ki hai aur 3 loge to ₹7.5 dene padenge.

👉 Pehle Guna Karo, Phir Point Lagao 👈