What is the sum of even numbers from 50 to 130? Here we will show you step-by-step how to calculate the sum of even numbers from 50 to 130.
Step 1) We start by finding the first (F) and last (L) even numbers from 50 to 130. It is easy to do that by simply looking at the numbers. The first even number is 50, and the last even number is 130.
F = 50
L = 130
Step 2) Next, we calculate the total even numbers (T) there are from 50 to 130, using a formula. Here is the formula and the math:
T = (L - F + 2) ÷ 2
T = (130 - 50 + 2) ÷ 2
T = 82 ÷ 2
T = 41
Step 3) Finally, we use the information from Step 1 and Step 2, and another formula, to calculate the sum of even numbers from 50 to 130, like this:
Sum = (T ÷ 2) × (2 × F + (2 × (T - 1))
Sum = (41 ÷ 2) × (2 × 50 + (2 × (41 - 1))
Sum = 20.5 × (100 + 80)
Sum = 20.5 × 180
Sum = 3690
Sum of even numbers from 50 to 130 = 3690
Sum of Even Numbers Calculator
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