What is 2-Digit Multiplication?
Multiplication magic!
When we multiply two 2-digit numbers, we're combining groups of tens and ones. It's like having a box of 24 crayons (that's 2 tens and 4 ones) and wanting to know how many crayons you'd have if you had 15 boxes!
The Grid Method
1️⃣ Break both numbers into tens and ones
2️⃣ Multiply each part separately
3️⃣ Add all the results together
Let's Try Some Examples!
Example 1: 24 × 15
Let's break it down step by step:
×
20
4
10
200
40
5
100
20
Now add them all together: 200 + 40 + 100 + 20 = 360
Example 2: 36 × 42
Try solving this one yourself first!
Let's break it down:
36 × 40 = (30 × 40) + (6 × 40) = 1200 + 240 = 1440
36 × 2 = (30 × 2) + (6 × 2) = 60 + 12 = 72
Now add them: 1440 + 72 = 1512
So, 36 × 42 = 1512
Parent Tips 🌟
- Use real-world examples: Ask your child to calculate totals when shopping (e.g., "If apples cost 45 cents each and we buy 12, how much will we pay?")
- Make it visual: Use graph paper to show the grid method with colored pencils for different parts of the multiplication.
- Practice with games: Play multiplication bingo or create flashcards for quick practice sessions.