This document provides instructions for a prayer, followed by a list of names. It then discusses the large number of cellphone users in the world and provides the number in word and numeral forms. Finally, it discusses place value, expanded form, and rounding off numbers. The key information is that over 472 billion people used cellphones in one year, place value involves periods of billions, millions, thousands, and units, and there are rules for writing numbers in expanded form and rounding off to the nearest place value.

2. Prayer
Father in heaven,
I give you today,
All that I think, do and say.
I will work and love,
Have fun and play.
Jesus be with me all through the
day.
Saints Peter and Paul, Pray for
us.

5. 1. Danwyn Chloe Bermudez
2. Kyrios Troy Peria
3. Jaylie Rhoanne Peña

8. • Did you know that the cellphone is used by millions of
people around the world for fast communication. In one
particular year, the number of people using cellphone
reached as high as 472 631 509 080?

9. 472 631 509 080
Read:
Four hundred seventy-two billion, six hundred thirty-
one million, five hundred nine thousand, eighty.
This is the numeral form.
This is the number
in word form.

10. 2 0 8
H
U
N
D
R
E
D
S
T
E
N
S
O
N
E
S

11. PERIOD
PLACE VALUE CHART
BILLIONS MILLIONS THOUSANDS UNITS
H
U
N
D
R
E
D
S
T
E
N
S
O
N
E
S
H
U
N
D
R
E
D
S
T
E
N
S
O
N
E
S
H
U
N
D
R
E
D
S
T
E
N
S
O
N
E
S
H
U
N
D
R
E
D
S
T
E
N
S
O
N
E
S
4 7 2 6 3 1 5 0 9 0 8 0

12. • The place value chart is divided into periods starting
from –
UNITS
THOUSANDS
MILLIONS
BILLIONS
• There are 3 places in each period;
ONES
TENS
HUNDREDS

13. • The value of a place on the left is 10 times greater than
the place on the right.
Examples:
1 x 10 =
10 x 10 =
100 x 10 =
1 000 x 10 =
10 000 x 10 =
10
100
1 000
10 000
100 000
TENS
HUNDREDS
THOUSANDS
TEN THOUSANDS
HUNDRED THOUSANDS
This is what you call
the POWERS OF
10!

14. 208
- Two hundred eight
1 692
- One thousand, six hundred ninety - two

15. 122 520
- One hundred twenty-two thousand,
five hundred twenty.
72 854
- Seventy-two thousand, eight hundred
fifty-four

16. 52 002 600
- Fifty-two million, 2 thousand, six hundred
243 000 412
- Two hundred forty-three million, four
hundred twelve

17. 76 032 609 000
- seventy-six billion, thirty-two million, six
hundred nine thousand
831 000 400 001
- Eight hundred thirty-one billion, four hundred
thousand, one

18. 52 002 600
243 000 412
76 032 609 000
831 000 400 001
ZERO is a place holder in the
number. Without zeros, these
numbers will have different
value.

20. Let’s Try This!
• Give the place value of the underlined digit.
1) 4 621
2) 76 204 099
3) 231 000 200
4) 92 004 213 230

21. • Write the number form of the following:
1. Twenty-five thousand, four hundred fifteen
2. Three hundred fifty thousand, two hundred two
3. Eighty million, nine hundred twenty thousand, six
hundred
4. Seventy-two billion, four hundred fifty-three
million, one hundred thousand

22. • Write the word form of the following:
1) 54 200
2) 2 003 120

23. • Another way of writing of writing numbers is through
expanded form.
• The expanded form is the way of writing the number in
terms of the sum of the value of each digit.

24. Let us find the value of each digit in 27 634 206 403.
Digit Place Value Value of Digit
2 x 10 000 000 000 (ten billions) 20 000 000 000
7 x 1 000 000 000 (billions) 7 000 000 000
6 x 100 000 000 (hundred millions) 600 000 000
3 x 10 000 000 (ten millions) 30 000 000
4 x 1 000 000 (millions) 4 000 000
2 x 100 000 (hundred thousands) 200 000
6 x 1 000 (thousands) 6 000
4 x 100 (hundreds) 400
3 x 1 (ones) 3

25. Let’s Add! 20 000 000 000
7 000 000 000
600 000 000
30 000 000
4 000 000
200 000
6 000
400
+ 3
27 634 206 403

26. The expanded form of 27 634 206 403 is:
27 634 206 403 = 20 000 000 000 + 7 000 000
000 + 600 000 000 + 30 000 000 + 4 000 000 +
200 000 + 6 000 + 400 + 3

27. Let’s Try!
5 426
The value of 5 is 5 000
The value of 4 is 400
The value of 2 is 20
The value of 6 is 6
5 000
400
20
+ 6
5 426

28. The expanded form of 5 426 is:
5 426 = 5 000 + 400 + 20 + 6

29. Let’s Try! 20 563 401
20 000 000
500 000
60 000
3 000
400
+_______1_
_
20 563 401
To write in expanded notation form:
20 563 401 = 20 000 000 + 500
000 + 60 000 + 3 000 + 400 + 1

31. Rules in Rounding Off Numbers
1. If the digit of the place to be rounded off is
followed by a number less than 5, copy the digit
to its left and replace the digits to its right with
zeros.
Example:
13 215
Is the number to the
right of the underlined
digit less than 5 or
greater than 5?

32. It is less than 5!
13 215 13 000

33. Rules in Rounding Off Numbers
2. If the digit of the place to be rounded off is 5 or
more, add 1 to the digit to its left and replace the digits
to its right with zeros.
Example:
26 432 654
Is the number to the right
of the underlined digit less
than 5 or greater than 5?

34. It is more than 5!
26 432 654 30 000 000

35. Let’s Try…
• Round off the following the nearest place value of
the underlined digit.
346 254 350 000
2 537 287 2 500 000

37. 1. Answer pages 4, 5 and 6 on your book.
a) Gain Skill – Exercises A, B and C
b) Hype Up Your Knowledge – Test A, B and C.
2. Answer pages 8, 9 and 10 on your book.
a) Gain Skill – Exercises A, B and C
b) Hype Up Your Knowledge – Test A, B and C.