NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 4: Fractions & Decimals - Problems and Solutions

Question 107

1. We want a number that, when added to 25.5, gives 50.
   So we can write: \[ ext{number} + 25.5 = 50 \]
2. To find the number, subtract 25.5 from 50.
   \[ ext{number} = 50 - 25.5 \]
3. Do the subtraction in two easy parts:
   • First subtract the whole number part:
     \[ 50 - 25 = 25 \]
   • Now subtract the decimal part:
     \[ 25 - 0.5 = 24.5 \]
   So, \[ 50 - 25.5 = 24.5. \]
4. Quick check: add your answer back to 25.5:
   \[ 24.5 + 25.5 = 50 \]
   This matches the question, so the answer is correct.

Final answer: \( 24.5 \)