Well, let's take a moment to appreciate these numbers and the magic they hold. When we subtract -20 from -15, we are essentially adding 20 to 15, which gives us a final answer of 5. It's just like painting happy little numbers on the canvas of mathematics.
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The difference between -15 and -20 is calculated by subtracting -20 from -15. This can be done by adding the additive inverse of -20 to -15, which is the same as adding 20 to 15. Therefore, the difference between -15 and -20 is 5.
15 + 5 =20 so its 5
3/4 = 15/20, 3/5 = 12/20 so difference is 3/20 or 15%
The difference between 5 and 20 is 15.
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The sequence of differences between consecutive numbers is 9, 1, -20, 9, 1. If this continues then the next difference is -20 and therefore the seventh number is -5. (15 - 20).