Arrays and Repeated Addition

4 rows of 5 means 5 + 5 + 5 + 5 = 20.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 79

How many cookies are in this array? Instead of counting one by one, add the rows!
Each row has 5. There are 4 rows. 5 plus 5 plus 5 plus 5 is 20!
You can skip count by 5s too: 5, 10, 15, 20.
Adding the same number again and again is called repeated addition. Here, 3 rows of 4 is 4 plus 4 plus 4, which is 12.

Georgia's K-12 Mathematics Standards:

2.NR.3.2 — Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.