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NCERT Solutions for Class 5th Maths Chapter 4 More Fuel Arithmetic — More Fuel Arithmetic

Book page 44 Updated on2026-09-19

Q1.
A minibus has 18 l of fuel left. After refuelling, the fuel meter indicates 65 l. How much fuel has been filled in the fuel tank of the minibus?
Answer

47 litres of fuel was filled.

The tank had 18 l. After filling, the meter shows 65 l. We want the part that was added, so we take the old amount away from the new amount.

Fuel filled = 65 l − 18 l
  1. Ones: 5 is smaller than 8, so we cannot subtract yet. Regroup — take 1 ten from the 6 tens and break it into 10 ones.
  2. The tens are now 5 and the ones are 5 + 10 = 15.
  3. Ones: 15 − 8 = 7.
  4. Tens: 5 − 1 = 4.
TO
5 (was 6)15 (was 5)
− 18
47
Fuel filled = 47 litres
Q2.
Check if 18 + 47 = 65?
Answer

Yes. 18 + 47 = 65, so the answer 47 l is correct.

  1. Ones: 8 + 7 = 15. Write 5 and carry 1 ten.
  2. Tens: 1 + 4 = 5, and the carried 1 makes 6.
  3. The answer is 65 — exactly the reading on the fuel meter.
18 l (already in the tank) + 47 l (filled) = 65 l (meter reading) ✓
Why this check works: Subtraction pulls a part out of the whole. Adding the part back must return you to the whole. If it does not, something went wrong in the subtraction — most often a forgotten regrouping.
Make it a habit: After every subtraction, add your answer to the number you took away. If you land back on the number you started with, you are right.
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