Multiply one-digit numbers by two-digit numbers
Key points :
๐ฏ What Does It Mean?
Multiplying a 1-digit number (like 2, 3, 5, 7) by a 2-digit number (like 12, 25, 48) means repeated addition.
Example:
3 ร 24 = 24 + 24 + 24 โ
๐ง Steps to Multiply (Simple Method)
โ๏ธ 1. Multiply Ones Place First
- Multiply the ones digit of the 2-digit number by the 1-digit number
Example:
3 ร 27
Step 1: 3 ร 7 = 21 โ write 1, carry 2
โ๏ธ 2. Multiply Tens Place
- Multiply the tens digit with the 1-digit number and add the carry
Step 2: 3 ร 2 = 6
6 + 2 (carry) = 8
โ Final Answer: 81
So, 3 ร 27 = 81
๐ข Example Problems
| Question | Working | Answer |
|---|---|---|
| 4 ร 23 | (4 ร 3 = 12) โ 2, carry 1 (4 ร 2 = 8 +1 = 9) | 92 |
| 6 ร 14 | (6 ร 4 = 24) โ 4, carry 2 (6 ร 1 = 6 +2 = 8) | 84 |
๐งฎ Why Learn This?
โ Helps in bigger multiplication
โ Useful in daily life (money, shopping, counting items)
โ Builds strong math skills
๐ Tips & Tricks
โจ Tip 1: Practice with tables (1 to 9) to make it easy
โจ Tip 2: Always multiply from the ones place
โจ Tip 3: Donโt forget to add the carry
โจ Tip 4: Check your answer using estimation
Example:
7 ร 29 โ 7 ร 30 = 210 (approx)
Actual answer: 203
๐ Fun Shortcut
If the 2-digit number ends in 0, multiply the 1st number and add a zero.
Example:
6 ร 30 = 6 ร 3 = 18 โ 180
Learn with an example
๐ฏ Multiply.
11 x 6 =___
- Multiply the ones.
- 11 x 6 = 6
- Multiply the tens.
- 11 x 6 = 66
- The product is 66.
๐ฏ Multiply.
11 x 3 =___
- Multiply the ones.
- 11 x 3 = 3
- Multiply the tens.
- 11 x 3 = 33
- The product is 33.
๐ฏMultiply.
11 x 8 =___
- Multiply the ones.
- 11 x 8 = 8
- Multiply the tens.
- 11 x 8 = 88
- The product is 88.
Let’s practice!๐๏ธ

