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mylen [45]
3 years ago
7

Please help if you can. Integers. Hand writing's messy sorry about that.

Mathematics
1 answer:
egoroff_w [7]3 years ago
8 0
-9 + 279 = 270.
different signs (negative vs positive) subtract, keep the sign of the highest number.

-9 - 279 = -288.
same signs add and keep

-9 • 279 = -2,511. positives and negatives always equal negatives.

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