Understanding 2-digit Multiplication
Multiplication gets more exciting when we work with bigger numbers!
When multiplying by 2-digit numbers, we use a special method called the "long multiplication" or "standard algorithm." It might look tricky at first, but once you understand the steps, you'll be multiplying like a pro!
The Step-by-Step Method
Step 1: Write the numbers vertically with the larger number on top
Step 2: Multiply the top number by the ones digit of the bottom number
Step 3: Write a zero below your first answer (this is your placeholder)
Step 4: Multiply the top number by the tens digit of the bottom number
Step 5: Add the two results together to get your final answer
Let's Practice Together!
Example 1: 24 × 15
Click to see the step-by-step solution!
1. Multiply 24 by 5 (ones place): 24 × 5 = 120
2. Write a zero below: 0
3. Multiply 24 by 1 (tens place): 24 × 10 = 240
4. Add them together: 120 + 240 = 360
🎉 Final answer: 360
Example 2: 37 × 42
Click to reveal the magic of multiplication!
1. Multiply 37 by 2 (ones place): 37 × 2 = 74
2. Write a zero below: 0
3. Multiply 37 by 4 (tens place): 37 × 40 = 1,480
4. Add them together: 74 + 1,480 = 1,554
🎉 Final answer: 1,554
Parent Tips 🌟
- Real-world practice: Have your child calculate totals when shopping (e.g., 12 apples at 35 cents each).
- Break it down: Encourage them to think of 2-digit multiplication as two separate multiplications added together.
- Estimation first: Teach them to estimate the answer before calculating to check if their final answer makes sense.