-14 - +7 - -25 = 4
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the answer of negative 4 minus positive 21 is positive 25 because you leave the negative 4 as is, change the minus to a plus, and change positive 21 to negative 21. (Leave Change Change)
Subtracting a negative number has the same effect as adding a positive number. In this case, 25 - (-30) = 25 + 30 = 55.
A minus negative acts like a plus. -25-(-42)= -25+42 Different signs means find the difference of 17 and put the sign of the greater absolute value. So positive 17 is your answer.
-20 -(-5) = -15 ie -(-5) = +5 therefore -20 +5 =15 (two double minuses = a positive)
-3 minus -28 is 25