The document discusses the process of rounding numbers to a specified place value by looking at the digit to the right of the place being rounded to and either adding or keeping the same digit based on if it is below or above 5, and changing all digits to the right to zero; it provides an example of rounding 2,372 to the hundreds place as 2,400; and it gives an assignment to round several numbers to the nearest ten thousands.

1. Read the following numbers.
• 18, 453
• 9, 009, 370
•570, 045
• 4, 90,1 067

2. Can you guess the exact number of
people in the picture?

3. Rounding-off
Numbers

4. Rounding means making
a number simpler but keeping its
value close to what it was. The
result is less accurate, but easier to
use.

5. The Rounding Poem
Find your number.
Look right next door.
4 or less just ignore.
5 or more, add 1 more.

6. Find the place value and
circle that digit
2,372
We are rounding to the hundreds place,
so we are going to circle the number in the hundreds place.

7. Move to the right,
underline the number
Look to the right of the number that is circled.
The place value next to the hundreds place is the tens place.
Underline the number in the tens place.
2,372

8. 0 through 4,
Circle stays the same
If the number underlined is 0, 1, 2, 3, 0r 4,
leave the number in the circle alone.
The number underlined is a 7,
so this step does not apply.
2,372

9. 5 through 9,
Add 1
If the number underlined is 5, 6, 7, 8, 0r 9
add 1 to the number in the circle.
The number underlined is a 7,
so add 1 to the number in the circle.
3 + 1 = 4
2,472

10. Now flex your muscles like a hero,
Digits to the right change to ZERO
All the digits to the right of the number in the circle,
change to ZERO.
The tens place and the ones place
are to the RIGHT of the hundreds place.
So, the 7 and the 2 both changed to ZERO.
2,400

11. We just rounded 2,372 to the nearest hundred.
The nearest hundred is 2,400.
2,300 2,4002,350
2,372
x
2,372 is closer to 2,400 rather than 2,300.

12. How do we round numbers?
To round off a whole number to a
specified place value, determine the digit
to the right of the place you are rounding
off to.

13. If the digit is 5,6,7,8,and 9, round
it up or simply add 1 to the digit in the
specified place and replace the digits
to the right with zeros.

14. If the digit is less than 5
(4,3,2,1,and 0) retain the digits in
the specified place and
replace/change the digits to the
right with zero

15. Assignment:
Round off to nearest Ten Thousands the
ff. numbers.
1) 781 000
2) 2 342 670
3) 54 671
4) 63 421
5) 241 584