What is the sum of odd numbers from 8 to 159? Here we will show you step-by-step how to calculate the sum of odd numbers from 8 to 159.
Step 1) We start by finding the first (F) and last (L) odd numbers from 8 to 159. It is easy to do that by simply looking at the numbers. The first odd number is 9, and the last odd number is 159.
F = 9
L = 159
Step 2) Next, we calculate the total odd numbers (T) there are from 8 to 159, using a formula. Here is the formula and the math:
T = (L - F + 2) ÷ 2
T = (159 - 9 + 2) ÷ 2
T = 152 ÷ 2
T = 76
Step 3) Finally, we use the information from Step 1 and Step 2, and another formula, to calculate the sum of odd numbers from 8 to 159, like this:
Sum = (T ÷ 2) × (2 × F + (2 × (T - 1))
Sum = (76 ÷ 2) × (2 × 9 + (2 × (76 - 1))
Sum = 38 × (18 + 150)
Sum = 38 × 168
Sum = 6384
Sum of odd numbers from 8 to 159 = 6384
Sum of Odd Numbers Calculator
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