Title Card Stay Sharp with Math and Logic
Title Card
Stay Sharp with Math and Logic
Rodenette udtohan-Cagara
San Isidro Elementary School
Dulag North District Guide Card
We would like to enter the kingdom,
but there are numbers that need to
be round off. We don’t know what
to do?
Don’t worry guys! It’s very
easy! I’m thinker Bell friend of
Dora the master of rounding
off numbers.
Least Learned Skill
Hello guys! Can I help you?
I think you’re in trouble!
Task
Analysis
0.64
4 < 5, so Round down 0.6
0.67
7 > 5, so Round up 0.7
Rounding decimals to the nearest tenths/hundredths
Subtasks: 1. Rounding off numbers to the nearest
tenths.
2. Rounding off numbers to the nearest
hundredths..
To round off to the nearest
tenth, add 1 to the
tenths digit if the hundredths digit
is 5 or greater. Retain the tenths
digit ifthe hundredths
digit is less than 5. Then drop the the
hundredths place.
To round off to the nearest hundredths, add 1 to
0.653
the hundredths digit if the thousandths digit
3 < 5 so round
is 5 or greater. Retain the hundredths digit down
if the thousandths digit is less than 5. Then
.65
drop the the thousandths place.
0.656
6 > 5, so round
up
0.66
0.678 –
0.68
0.676 –
0.7
0.673 – 0.67
0.631 - 0. 6
If 5,6,7,8,9 add 1 to the number that
is being rounded. Then dropped
the remaining numbers.
To make it simple just look the
next number to the right if it is
0,1,2,3,4 do not change the
rounded off. Then dropped the
remaining numbers.
Discovering a pattern:
Study how the
decimals are rounded.
0.316
tenths .3
Hundredths . 32
1.2871
tenths 1.3
Hundredths 1.29
Try these:
Activity card
Activity 1: Round off each number to the
nearest tenths.
18.34
21.45 72.38
29.22
Round off each number to the
nearest hundredths.
Activity 2: Complete the table. Round each number to
the given place value.
tenths hundredths
0.627
0.845
0.632
8.725 0.056 0.108
I am a number with two decimal
2.462
0.964
1.467
Activity 3:
Hey guys! Can you enter
now the kingdom?
Assessment
Card
Happy way to Kingdom
For your info.. stop.. look… read…and
solve more..
To round off decimal numbers.
1. Look for the number that is being
rounded.
2. Look at the digit at the right of
the rounding number.
3. If the number is 5,6,7,8,9 add 1 to
the rounding number.
4. If the digit at the right of the
rounding number is 0,1,2,3,4 do not
change the rounding number.
5. Dropped the remaining digits.
Enrichment Card
Think and apply:
Aling Aida bought .693
of a meter of cloth.
What is the length of the
cloth to the nearest
tenth of a meter? To the
nearest hundredth
of a meter?
Reference Card:
References: Lesson Guides in Elementary
Mathematics:Department of Education ,
Mathematics for a better life
textbook: Carmelita C. Coronel, Merly
M. Pineda, Terista T. Tungol.
WWW.animation .com
Answer Key
Activity 1: Round off each number to the
nearest tenths.
Round off each number to the
nearest hundredths.
18.34 - 18.3 21.45 – 21.5 72.38 – 72.4 29.22 – 29.2
0.632 – 0.63
8.725 – 8.73
0.056 – 0.06 0.108 – 0.11
Activity 2: Complete the table. Round each number to
the given place value.
tenths hundredths
0.627 0.6 0.63
0.845 0.8 0.85
2.462 2.5 2.46
0.964 1.0 0.96
1.467 1.5 1.47
Activity 3:
I am a number with two decimal places. My decimal
part is the same as my whole number part. My
hundredths digit is twice my tenths digit. When
rounded off to the nearest tenth, my tenths digit
is half my ones digit. If my tens digit is 2,
what number am I? 24.24
Happy way to heaven:
Think and apply:
Aling Aida bought .693
of a meter of cloth.
What is the length of the
cloth to the nearest
0.53-0.5 .567-.57 0.39-0.4 0.678-
0.68
0.77-0.78
tenth of a meter? To the
nearest hundredth
of a meter? Tenth-.7,
hundredths - .69