Sums - Series of Integers 1 to N - Equation to Sum (Level 2)

This math topic focuses on calculating the sum of a series of integers from 1 to N using a mathematical formula. Students practice applying the formula \( \frac{n(n+1)}{2} \), where 'n' represents the end number of the series. They solve problems involving different endpoint values such as 12, 25, and 17, among others, and choose the correct sum from multiple-choice options. This topic is a part of a larger unit on number patterns and patterning practice.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.