Remember that any number that can be found on a number line is an integer.

Figure 1. |
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The number line can be used to help with addition of integers that have different signs. Let's use the number line to solve the following equation:

(-2) + 5 = ?

Figure 2. |
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We start at zero. Because the first term is (-2), we start by substracting 2:

Figure 3. |
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Next, we add the second term (5):

Figure 4. |
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This gives us our final answer:

(-2) + 5 = 3