Math

1. MATH
TIME
Week 1 Day 4

2. DRILL

3. Read the fol owing numbers.
18 453
9 009 370
4 901 067
5 702 045

4. Gues ing Game
Al pupils wil solve the given problem as fast as they
can. The first pupil who wil give the cor ect answer
wins.
a.My ones digit is 2. My tens digit is twice the ones
digit. My hundreds digit is thrice the ones digit and
my thousands digit is the sum of the ones and the
tens digit. What number am I?
b.I am a 6-digit number. My thousands digit is 9. My
ten thousands digit is 4.My hundred thousands digit
is 3. My hundreds digit is 2.My ones digit is 7. The
other digits is zero. Who am I?

5. REVIEW

6. A. If we skip count by 100s
1 238 is nearer to 1 200 than
4 299 is nearer to
5 478 is nearer to
6 872 is nearer to
2 879 is nearer to
4 590 is nearer to
than
than
than
than
than
1 300.
.
.
.
.
.

7. B. If we skip count by 1 000s
41 238 is nearer to 41 000 than 42
000.
52 299 is nearer to than .
75 475 is nearer to than .
16 872 is nearer to than .
32 479 is nearer to than .
47 590 is nearer to than .

8. MOTIVATION

10. PRESENTATION

11. How wil you solve the problem?

12. Performing
the Activities

13. To what numberis 22 950 closer? 20 000or
30 000?
Since it is closer to 20 000, round it down.
Find 25 800. Where is it located? Look at the
number line. Examine. Lead pupils to answer
the problem by asking: Which is 25 800closer
to?
Study the number line.

14. When do we round up
and when do we round
down?

15. Group Activity
Complete the table.
M
O
N
E
Y Roundtothe Nearest
Ten
Thousand
s
Hundred
Thousands
Millions
P
h
p5 016575
P
h
p7867570
P
h
p1 265
420
P
h
p8704765
P
h
p3897543

16. Processing
the Activities

17. When do we round
up and when do we
round down?

18. Reinforcing
the Concept
and Skill

19. Round off the fol owing numbers to the
indicated place value.
Nearest Thousands
1) 78 125
2) 51 789
3) 25 507
4) 6 895

20. Round off the fol owing numbers to the
indicated place value.
Nearest Ten Thousands
1) 781 000
2) 2 342 670
3) 54 671
4) 63 421

21. Round off the fol owing numbers to the
indicated place value.
Nearest Hundred Thousands
1) 8 562 902
2) 5 124 900
3) 12 578 124
4) 9 876 540

22. Round off the fol owing numbers to the
indicated place value.
Nearest Mil ions
1) 14 568 140
2) 29 128 035
3) 50 671 904
4) 47 132 090

24. “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. 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. 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 zeros

25. Applying to New
and
Other Situations

27. ASSESSMENT

28. Round to the highest place value.
1. 24 567
2. 129 467
3. 72 560 458
4. 4 670 138
5. 2 453 760 435
6. 4 125 902 567
7. 136 786
8. 34 089 457
9. 5 246 790 653

29. HOME
ACTIVITY

30. Encirclethenumbersthatcanberoundedtothegivennumbers.
1) 3200000
3 234 567 3 256 418 3 178 982 3 214 675 3 265 109
2) 47000000
46 864 125 47 432 160 47 876 523 47 082 971 46 087 542
3) 2000000000
2 123 456
789
2564 768
980
2 098 765
432
1 765 000
982
1 980 701
673

31. Enrichme
nt

32. The fol owing are the land areas in square kilometres
of some Asian countries. Round off each area to one-
digit accuracy.
Example:
685 rounded to one-digit accuracy is 700.
1. Indonesia : 1 919 443
2. Philippines : 300 076
3. Singapore : 618
4. Malaysia : 131 587
5. Brunei : 5 765
6. Japan : 377 801
7. Thailand : 513 998
8. Kampuchea : 181 035