By how much is 5643879 smaller than one crore ?

Options

A. `4356122`
B. `4356121`
C. `4356221`
D. `4357121`

Answer

To find out how much 5643879 is smaller than one crore, we need to subtract 5643879 from 1 crore.

Step 1: Write down the values.
- One crore is equal to 1,00,00,000.
- The number we are comparing is 5,643,879.

Step 2: Set up the subtraction.
We will subtract 5,643,879 from 1,00,00,000.

Step 3: Perform the subtraction.
```
1,00,00,000
- 5,643,879
-----------------
```

Step 4: Start subtracting from the rightmost digit:
- In the units place: 0 - 9 → we cannot subtract, so we need to borrow from the next column.
- In the tens place: 0 - 7 → we cannot subtract, so we need to borrow again.
- In the hundreds place: 0 - 8 → we need to borrow.
- In the thousands place: 0 - 3 → we need to borrow.
- In the ten-thousands place: 0 - 4 → we need to borrow.
- In the lakhs place: 0 - 6 → we need to borrow.
- In the crores place: 1 - 5 → we need to borrow.

After borrowing, the subtraction looks like this:
```
99,99,10,000
- 5,643,879
-----------------
```

Now we can perform the subtraction:
- 10 - 9 = 1
- 9 - 7 = 2
- 9 - 8 = 1
- 9 - 3 = 6
- 9 - 4 = 5
- 9 - 6 = 3
- 0 - 5 = 0 (since we borrowed)

So, the result of the subtraction is:
```
43,56,121
```

Step 5: Conclusion
5643879 is smaller than one crore by 43,56,121.