Download App

Negative Numbers and Integers — Maths STD 6 — Question

Maharashtra BoardEnglish MediumSTD 6MathsNegative Numbers and Integers2 Marks
Question
Calculate:
1 - 2 + 3 - 4 + 5 - 6 + 7 - 8 + ... + 49 - 50
✓

Answer

1 - 2 + 3 - 4 + 5 - 6 + 7 - 8 + ... + 49 - 50
= (1 - 2) + (3 - 4) + (5 - 6) + (7 - 8) + ... + (49 - 50)
= (-1) + (-1) + (-1) + ... + 25 terms
= (-1) × 25
= -25
Hence, 1 - 2 + 3 - 4 + 5 - 6 + 7 - 8 + ... + 49 - 50 = -25

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Mark Question" from Negative Numbers and Integers→Negative Numbers and Integers — all question types→Maths STD 6 question papers→Maharashtra Board STD 6 question papers→Maharashtra Board question paper generator→

Similar questions

Determine the sums given below using suitable rearrangement.
1 + 2 + 3 + 4 + 96 + 97 + 98 + 99
→
Use the number line and add the following integers:
5 + (-2) + (-6)
→
Define like and unlike fractions and give five examples of each.
→
Find the ratio of the following in the simplest form:
3 weeks to 3 days.
→
Represent the following fractions on the number line:
$\frac{2}{5}$
→
The final marks in mathematics of 30 students are as follows:
53, 61, 48, 60, 78, 68, 55, 100, 67, 90
75, 88, 77, 37, 84, 58, 60, 48, 62, 56
44, 58, 52, 64, 98, 59, 70, 39, 50, 60
If 40 is the pass mark how many have failed?
→
Express as kilometer (km) using decimals:
5555m
→
Round off the following to the nearest thousand:
5624
→
Find the value of the following using various properties:
569 × 17 + 569 × 13 + 569 × 70
→
Verify by substitution that:
The root of 5x - 8 = 2x - 2 is x = 2
→