What Does It Mean to Multiply 2-Digit Numbers?
Multiplication is like repeated addition, but faster!
When we multiply two 2-digit numbers, we're combining groups of tens and ones. Imagine you have 24 boxes of crayons, and each box has 36 crayons. To find the total, you'd multiply 24 × 36!
The Grid Method (Easy Way!)
1️⃣ Break it down: Split both numbers into tens and ones
2️⃣ Multiply parts: Multiply each part separately
3️⃣ Add them up: Combine all the partial products
Let's Try Some Examples!
Example 1: 15 × 23
Let's use the grid method to solve this!
20
3
10
10 × 20 = 200
10 × 3 = 30
5
5 × 20 = 100
5 × 3 = 15
Now add them all together: 200 + 30 + 100 + 15 = 345
You can also use the standard method:
15
× 23
----
45 (15 × 3)
+300 (15 × 20, shifted left)
----
345
Example 2: 42 × 37
Let's practice with bigger numbers!
Great job! 42 × 37 = 1554
Remember: Breaking big problems into smaller parts makes them easier to solve!
Parent Tips 🌟
- Use real-world examples: Have your child calculate total costs when shopping (e.g., 12 toys at $15 each) to show practical use of multiplication.
- Make it visual: Draw arrays or use graph paper to show how the grid method works physically.
- Practice with games: Play multiplication bingo or create flashcards with 2-digit numbers to make practice fun.