Mathematics for IGCSE & O level - Estimation (Section 1 - No. 40)
When rounding to a given number of decimal places, the digit immediately to the right of the required decimal place must be...
Ignored
Less than 5
Greater than or equal to 5
Added to the left digit
स्पष्टीकरण
When the digit to the right is 5 or greater, you round up.