Ravi had Rs. $850$ . He bought a bike for Rs. $475$ . How much money does he have left?

medium 2 marks Class 5 · Mathematics · The Fish Tale

Answer

375

The correct answer is 375 — The remaining amount is Rs. $375$ .

Step-by-step solution

Write the amounts in vertical form:
$850$
$475$
Start subtracting from the units place.
Units: $0 - 5$ cannot be done, so borrow $1$ (which is $10$ ) from the tens place. The tens place becomes $4$ and units become $10$ .
Units: $10 - 5 = 5$ ; write $5$ in the units place.
Tens: $4 - 7$ cannot be done, so borrow $1$ (which is $10$ ) from the hundreds place. The hundreds place becomes $7$ and tens become $14$ .
Tens: $14 - 7 = 7$ ; write $7$ in the tens place.
Hundreds: $7 - 4 = 3$ ; write $3$ in the hundreds place.
The remaining amount is Rs. $375$ .

Common mistake: Forgetting to borrow from the next higher place when the top digit is smaller than the bottom digit.

Concept tested: Subtraction of three‑digit whole numbers with borrowing