UpStudy Free Solution:

To find the total number of birds in the sanctuary during summer, you simply need to add the number of birds that join during summer to the initial number of birds in the sanctuary.
Given:

Initial number of birds: 3289

Number of birds that join during summer: 1438
Total number of birds in summer:
\[3289 + 1438\]
Perform the addition:
\[3289 + 1438 = 4727\]
So, the number of birds in the sanctuary during summer is \(4727\).
 

Supplemental Knowledge

In arithmetic, addition is one of the fundamental operations. It combines two or more numbers to get a total sum. The process of addition is straightforward and follows the commutative property, meaning that changing the order of the numbers does not change the sum.
For example, if you have \(a\) apples and you receive \(b\) more apples, the total number of apples you have is \(a + b\).

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