Solve Addition Problem: 66 + 24 Step-by-Step

In this problem, we need to add 66 and 24. Let's break this down step-by-step using the standard addition method:

• Step 1: First, we align the numbers by their place values:

$\begin{array}{c} \phantom{+}66 \\ +24 \\ \hline \end{array}$

• Step 2: Add the digits in the units place (rightmost column):

The units digits are 6 and 4. Adding these gives us $6 + 4 = 10$.

Write down 0 in the units place, and carry over 1 to the tens place.

• Step 3: Add the digits in the tens place (including the carry-over):

The tens digits are 6 and 2, along with the carried 1. Adding these numbers gives us $6 + 2 + 1 = 9$.

• Step 4: Combine the results:

Placing the digits together, we have a final result of 90.

Thus, the solution to the addition problem $66 + 24$ is $90$.