Solve the addition exercise,
using two jumps on the number line below:
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Solve the addition exercise,
using two jumps on the number line below:
To solve this problem using a number line and two jumps, follow these steps:
Therefore, the number that fills the gap in the equation is .
Add fifty units to the number 31.
What is the resulting number?
Using two jumps makes mental math easier! The first jump gets you to a round number (like 30), then the second jump is usually just a small step to your final answer.
Pick the nearest round number that's between your starting point and ending point. From 24 to 31, the best choice is 30 because it's easy to calculate both 24 + 6 = 30 and 30 + 1 = 31.
Double-check your arithmetic! Make sure your first jump actually reaches the round number you chose, and your second jump reaches the final target. Then add both jump sizes together.
Yes, but choose wisely! You could jump to 25 or 28, but 30 is the most convenient because it's a multiple of 10 and makes the second jump very small.
For addition problems like this one, both jumps will be forward (to the right). If you were subtracting, you might jump backward, but here we're adding a positive number.
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