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Q: What is the formula for 10 plus 9 plus 8 plus 7 plus 6 plus 5 plus 4 plus 3 plus 2 plus 1?

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30. 2+3+5=10, 4+6=10, and 2+4+1+1+2=10.

1+2+3+4=10 The formula for adding consecutive numbers is n*(n+1)/2. This could be done easily as mental math, on paper or using a calculator.

1 plus 1 is 2. Plus 1 is 3. Plus 1 is 4. Plus 10 is 14. 14.

5 times 2 is 10 2 times 1 is 22 times 2 is 4

3 + 5 + 6 + 9 + 2 + 1 + 10 = 36

It equals 10

15 + 15 + (10 * (1 / 2)) + (10 * (1 / 2)) = 40

If you mean the sum of first n natural numbers then the formula is (n(n+1))/2 for example, 1+2+3+4+5=5*6/2=15

The original questions is in parenthesis,71 plus 2 = 10 22 plus 31 =8 111 plus 22 =7(71) 7+1 "plus" 2 (2) = 10, (22) 2+2 (plus) (31) 3+1=8, (111) 1+1+1 "plus" (22) 2+2=7

It equals 28. ,

2 decimal, or 10 binary.

1/10 + 2/5 = 1/10 + 4/10 = 5/10 = 1/2

1/5 plus 1/2 is the same as 2/10 plus 5/10 = 7/10

2/5 + 1/10 = 4/10 + 1/10 = 5/10 = 1/2 or 0.5

2 plus 1-x divided by.

1 plus 1 x 2 plus 3 x 42 plus 10 x 5 = 1 + 2 + 126 + 50 = 179

1 + 30 + 2 + 3 + 5 + 6 + 10 + 15 = 72

22

1/10 + 1/2 = 6/10 or 3/5

1 + 2 + 4 + ... + 2n = 2n+1 - 1

"2 plus 2" is not a scientific formula. In fact, it is not a formula of any sort.

5/10 + 1/2 = 1

x2+2x=9 we can complete the square or use the quadratic formula. Let's complete the square. add 2/2=1 to both sides and we ahve x2+2x+1=10 now factor the left side and use the square root property (x+1)2=10 so x+1= plus of minus the square root of 10 x=- 1+ or - square root of 10 using the quadratic formula we have a=1, b=2 and c=-9 so [-2+ or - (square root of (4+36))]/2= -1 + or - square root of 10 as we had before.

2 1/5 + 1/4 + 1/4 = 2 7/10.

The answer is 1/2 plus 3/10 = 4/5 in its simplest form