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il63 [147K]
3 years ago
7

How are the expressions 8-15 and 8-(-15)?how are they different?

Mathematics
1 answer:
zmey [24]3 years ago
6 0

8 - 15 means subtract the positive number 15 from 8.

8 - 15 = 8 + (-15) = -7

8 - (-15) means subtract the negative number -15 from 8.

Subtracting a negative number is the same as adding a positive number.

8 - (-15) = 8 + 15 = 23

8 - 15 = -7, and 8 - (-15) = 23. The expressions mean different operations and have different answers.

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