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4 plus 10 plus 16 plus 70 equals 100. To find the sum of this series, simply add all the numbers together.
The sum of -3 and -4 is -7.
The sum of 3 plus 4 is 7.
Nope. Negative 4 plus 6 equals 2. You can see this more easily by rearranging the sum to be 6 - 4 = 2.
SUM means plus 4+7=11