Question

to make 77 + 48 easier to solve, lou decides to first add on from 77 to get to the next ten.
+ ?
←
|
|
→
77 80
add on to get to 80.
77 + ? = 80

Explanation:

Step1: Define the equation

We have the equation \(77 + x = 80\), where \(x\) is the number we need to find.

Step2: Solve for x

To find \(x\), we subtract 77 from both sides of the equation. So, \(x = 80 - 77\). Calculating the right side, \(80 - 77 = 3\).

Answer:

3