Question

sara played target 80. starting with 57, she made the equation shown wi
57 + 3 + 20 = 80
use saras work to complete the equation.
57 + ? = 80

Explanation:

Step1: Combine the known addends

First, we need to find the sum of 3 and 20 from Sara's equation \(57 + 3 + 20 = 80\). So, \(3 + 20 = 23\).

Step2: Verify the equation

Now, substitute this sum back into the new equation \(57 +? = 80\). We know that \(57 + 23 = 80\) because \(57+3 + 20\) is the same as \(57+(3 + 20)\) by the associative property of addition, and \(3+20 = 23\).

Answer:

23