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Sums - Series of Integers 1 to N - Equation to Sum (Level 3)

This math topic focuses on calculating the sum of integers from 1 to N using a specific formula. It practices the application of the sequence sum equation \(\frac{N(N+1)}{2}\) to determine the sums accurately. The subject includes a range of problems where learners apply the formula for different values of N, enhancing their skills in patterning and understanding advanced number patterns. Each problem requires solving for the correct sum and selecting the right answer from multiple choices, which reinforces computational accuracy and formula application.

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

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Sums - Series of Integers 1 to N - Equation to Sum

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.


What is the sum of the integers from 1 to 31 based on this equation?

31(31+1)2\frac{31(31+1)}{2}

Sums - Series of Integers 1 to N - Equation to Sum Worksheet

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Math worksheet on 'Sums - Series of Integers 1 to N - Equation to Sum (Level 3)'. Part of a broader unit on 'Patterns and Sums - Intro' Learn online: app.mobius.academy/math/units/patterns_and_sums_intro/
1
What is the sum of the integers from 1 to 13 based on this equation?
A LaTex expression showing 13(13+1) over 2
a
90
b
91
c
105
d
78
2
What is the sum of the integers from 1 to 20 based on this equation?
A LaTex expression showing 20(20+1) over 2
a
231
b
209
c
190
d
210
3
What is the sum of the integers from 1 to 35 based on this equation?
A LaTex expression showing 35(35+1) over 2
a
629
b
666
c
595
d
630
4
What is the sum of the integers from 1 to 31 based on this equation?
A LaTex expression showing 31(31+1) over 2
a
465
b
496
c
495
d
528
5
What is the sum of the integers from 1 to 26 based on this equation?
A LaTex expression showing 26(26+1) over 2
a
350
b
351
c
378
d
325
6
What is the sum of the integers from 1 to 34 based on this equation?
A LaTex expression showing 34(34+1) over 2
a
630
b
595
c
561
d
594
7
What is the sum of the integers from 1 to 30 based on this equation?
A LaTex expression showing 30(30+1) over 2
a
435
b
496
c
465
d
464