-5
add 9 add 1 subtract 20 add 9 add 1
Sum means add them together.15+20=35
Neither.
-85
The words, "sum of" mean 'the added together value of'... For instance, "What is the sum of 15, 20 and 45?" The method is to add each of these figures together: EG. 15 + 20 + 45 The answer, of course, is 80 ... written: 15 + 20 + 45 = 80, or 15+20+45=80
first you add 1 by 5 and get 6 then .add 6 by 2 and get 8 .and add 8 by 3 and get 11.add 11 by 4 get 15.add 15 by 5 get 20 its simple just keep adding each number by 1,2,3,4,5 and if the pattern continues keep going
25
-5 and -15 because -5 + -15 equals -5 - 15 which is -20 and -5 multiplied by -15 = 75 (two negatives multiply to make a positive)
If you add 27 and 8, the answer is 35. 7 plus 8 is 15 and add it to 20, the answer is 35.
115
33/4+43/5... First - add the whole numbers... 3+4=7 Next - make both fractions have the same denominator... 3/4 = 15/20 and 3/5 = 12/20 Now - add the two fractions together... 15/20 + 12/20 = 27/20 27/20 = 17/20. Now all you need to do is add the 7 from the first step, and you have the answer 87/20 15/4 = 75/20 23/5 = 92/20 75 + 92 = 167/20 = 8 and 7/20