Solve Vertical Addition: 377 + 3 Step by Step

$\begin{aligned} &377 \\ +& \\ &~~~~3 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

Let's solve this problem by performing vertical addition:

• Step 1: Write the numbers vertically, aligning the digits by place value.

$\begin{array}{c} 377 \\ + \\ \phantom{0}3 \\ \underline{\phantom{776}} \\ \end{array}$

• Step 2: Start with the units place. Add $7$ (from 377) and $3$, getting $10$.
• Step 3: Since $10$ is greater than $9$, we write down $0$ in the units place and carry over $1$ to the tens place.
• Step 4: Move to the tens place. Add $7$ (from 377 in tens place) plus the carried over $1$, resulting in $8$.
• Step 5: Move to the hundreds place. Since there is no additional value to add, it remains $3$.

Thus, the computed sum is:

$\begin{array}{c} 377 \\ + 3 \\ \underline{\phantom{776}} \\ 380 \\ \end{array}$

Therefore, the sum of $377$ and $3$ is $\mathbf{380}$.