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(10 + 1) x 10/2

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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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.

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

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

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

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

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1+2+3+4=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.

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

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

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

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

It equals 10

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

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

2 decimal, or 10 binary.

10 + 2(x - 1) + 7 x 3x + 1 =10 + 2x - 2 + (7 x 3x) + 1 =10 + 2x - 2 + 21x + 1 =2x + 21x + 10 - 2 + 1 =23x + 9

times 2 plus 1