2 minus -9 is 11.
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yes you can. You can add and subtract ANY number, negative or positive, even if it is a decimal. For example 1 + 1 = 2 -1+-1 = -2 -1+1 = 0 A minus plus a minus is a minus. A minus plus a positive is a minus.
Nine tenths plus two fifths minus one fourth is equal to 1.05
Nine times thirty-seven minus two hundred ninety is equal to 43.
negeative 64
They are: 25 minus 4 = 21