Here are the completed steps for the middle addition problem: Step 1: Identify the numbers from the visual representation. The left side shows two rods of ten and four single cubes, representing $20 + 4 = 24$. The right side shows one rod of ten and three single cubes, representing $10 + 3 = 13$. The problem is to add $24 + 13$. Step 2: Break down each number into tens and ones for the first line. $$ 24 = 20 + 4 $$ $$ 13 = 10 + 3 $$ So, the first line is: $$ = \boxed{20} \quad \boxed{4} \quad + \quad \boxed{10} \quad \boxed{3} $$ Step 3: Group the tens and ones together for the second line. Add the tens: $20 + 10 = 30$. Add the ones: $4 + 3 = 7$. So, the second line is: $$ = \boxed{30} \quad + \quad \boxed{7} $$ Step 4: Add the grouped tens and ones to find the total sum for the third line. $$ 30 + 7 = 37 $$ So, the third line is: $$ = \boxed{37} $$ The completed middle problem is: $$ \begin{align*} &= \boxed{20} \quad \boxed{4} \quad + \quad \boxed{10} \quad \boxed{3} \\ &= \boxed{30} \quad + \quad \boxed{7} \\ &= \boxed{37} \end{align*} $$ Send me the next one 📸