-110
141.6
Find the Sum to n terms of the series 5 5+55+555+ +n Terms
6 + 49 = 55
No. The sum is 65.
The sum of the numbers 1 through 10 is 55.
The concept of being able to swap numbers in an addition sum is called the commutative property of addition.
The sum of 85 and 55 is 140.
11(5 + 6) = (11 x 5) + (11 x 6) = 11 x 11 = 121
The sum of the first ten positive integers, i.e. 1,2,3,4,5,6,7,8,9, and 10, is 55. The sum of the first ten negative integers, i.e. -1,-2,-3,-4,-5,-6,-7,-8,-9, and -10 is -55. The sum of the first ten positive integers plus the sum of the first ten negative integers is 0.
905
Yes. The sum of 1 to 10 (inclusive) is 55.
20+35+40+55+60+55+80=345