Identify repeated addition in arrays: sums to 10
key notes :
🟩 What is an Array?
- An array is a picture of rows and columns.
- Example: 🍎🍎🍎
🍎🍎🍎 - Here, there are 2 rows and 3 apples in each row.
➕ Repeated Addition
Repeated addition is adding the same number again and again.
From the example above:
- Row 1 = 3 apples
- Row 2 = 3 apples
- Total = 3 + 3 = 6 🍎
🎯 How to Spot Repeated Addition in Arrays
Count how many items are in one row → that’s the number to repeat.
Count how many rows there are → that tells you how many times to add.
Example:
5 rows of 2 stars:
⭐⭐
⭐⭐
⭐⭐
⭐⭐
⭐⭐
- Repeated addition: 2 + 2 + 2 + 2 + 2 = 10 ⭐
🔢 Sum to 10 Practice
Arrays help us see sums to 10 easily.
Example arrays that make 10:
- 2 rows × 5 = 10 🍌🍌🍌🍌🍌
- 5 rows × 2 = 10 🍓🍓
- 1 row × 10 = 10 🥕
- 10 rows × 1 = 10 🥭
💡 Tip for Students
- Think: “Rows tell me how many times to add, and items in each row tell me what number to add.”
- Arrays make adding easier and faster!
🎨 Fun Idea:
- Draw your own arrays with candies, stars, fruits, or toys and write the repeated addition.
Learn with an example
Which addition statement describes the array?
- 4 + 4
- 2 + 2 + 2
The ovals have been grouped by rows.
The array has 3 rows. There are 2 ovals in each row.
The addition statement that describes the array is:
2 + 2 + 2
Which addition statement describes the array?
- 5 + 5
- 4 + 4
The squares have been grouped by rows.
The array has 2 rows. There are 5 squares in each row.
The addition statement that describes the array is:
5 + 5
Which addition statement describes the array?
- 4 + 4 + 4
- 2 + 2 + 2 + 2 + 2
The hearts have been grouped by rows.
The array has 5 rows. There are 2 hearts in each row.
The addition statement that describes the array is:
2+2+2+2+2
Let’s practice!🖊️
