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Negative Numbers and Integers — Maths STD 6 — Question

Maharashtra BoardEnglish MediumSTD 6MathsNegative Numbers and Integers2 Marks
Question
Simplity: 5 + (-5) + 5 + (-5) + .....
When the number of terms is 25
✓

Answer

When the number of terms is 25
5 + (-5) + 5 + (-5) + ..... = (5 + 5 + 5 + ..... 13 terms) + (-5 - 5 - 5 - ..... 12 terms)
= 13 × 5 + 12 × (-5)
= 65 - 60
= 5

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