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