Solve 78-□=44: Two-Jump Number Line Subtraction

To solve the subtraction problem $78 - \Box = 44$ using two jumps on a number line, we'll proceed as follows:

• Step 1: Start at 78 on the number line.
• Step 2: Make the first jump to the next convenient round number, which is 70 (as it simplifies the calculation).
• Step 3: Calculate this first jump as $78 - 70 = 8$.
• Step 4: Make the second jump from 70 directly to 44 (the target number).
• Step 5: Calculate this second jump as $70 - 44 = 26$.
• Step 6: Add the two jumps together: $8 + 26 = 34$.

Therefore, the missing number that satisfies $78 - \Box = 44$ is $\Box = 34$.