NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 1: Number System - Multiple Choice QuestionsQuestion 17
Class 6 - Mathematics - Unit 1: Number System - Multiple Choice Questions
Question. 17
A whole number is added to 25 and the same number is subtracted from 25. The sum of the results is
(A)
0
(B)
25
(C)
50
(D)
75
Detailed Answer with Explanation:
Step 1: Let the whole number be x. (Whole numbers are 0, 1, 2, 3, ...)
Step 2: Add x to 25:
\[25 + x\]
Step 3: Subtract the same x from 25:
\[25 - x\]
Step 4: Now add these two results:
\[(25 + x) + (25 - x)\]
Step 5: Remove brackets:
\[25 + x + 25 - x\]
Step 6: Group like terms:
\[(25 + 25) + (x - x)\]
Step 7: Simplify each group:
\[50 + 0 = 50\]
Answer: 50 (Option C).