Solve 34 + 47 Using Number Line Jumps: Step-by-Step Addition

To solve the addition problem $34 + 47$ using a number line, we'll follow these steps:

• Step 1: Start at the number 34 on the number line.
• Step 2: Add the tens from 47, which is 40. This takes us from 34 to 74.
• Step 3: Add the units from 47, which is 7. This takes us from 74 to 81.

Here's the detailed breakdown of each step:

Step 1: We start at 34.

Step 2: We add 40 (the tens from the number 47):
Adding 40 to 34 gives us $34 + 40 = 74$.

Step 3: We add 7 (the units from the number 47):
Adding 7 to 74 gives us $74 + 7 = 81$.

Therefore, the sum of $34 + 47$ is $81$.

Thus, the final answer is $\textbf{81}$, which corresponds to choice 3 in the given multiple-choice options.