## Samacheer Kalvi 3rd Standard Maths Book Solutions Term 1 Chapter 4 Measurements

Activity 1 (Text Book Page No. 45):

Tabulate the length of your class table measured by five of your friends with non-standard units.

Answer:

Activity to be done by the students themselves.

Activity 2 (Text Book Page No. 45):

Measure the length of ribbon by your hand span.

Friend 1 ___________ hand span

Friend 2 ___________ hand span

Friend 3 ___________ hand span

Friend 4 ___________ hand span

Answer:

Activity to be done by the students themselves.

Activity 3 (Text Book Page No. 45):

Students are divided into two groups. One group should measure the length of the class room in non standard units and the other group in standard units.

Answer:

Activity to be done by the students themselves.

Activity 4 (Text Book Page No. 45):

Group of five students measure the length of the black board by given objects.

Activity 5 (Text Book Page No. 47):

Measure the length of ribbon by tape roll.

Raj centimeter

Kavi centimeter

Anu centimeter

Kavi centimeter

Measurements measured using standard units do not change from person to person.

Answer:

Activity to be done by the students themselves.

Practice (Text Book Page No. 47):

Question 1.

Measure the length of following things by centimetre scale and write it in the table below.

Answer:

Activity to be done by the students themselves.

Question 2.

Measure length of the things by using ruler.

Measure the length of the following things in your house using a scale.

Answer:

Activity to be done by the students themselves.

Try this (Text Book Page No. 48):

a. Write metre or centimetre in the blank space.

i. My pencil is 6 _____ long.

Answer:

cm

ii. My hairpin is _____ long.

Answer:

mm

iii. This tree is 3 _____ high.

Answer:

m

iv. Height of coconut tree is 15 _____.

Answer:

m

b. Meena has a ribbon of 50 cm and Reena has a ribbon of 110 cm. Whose ribbon is the longer?

Answer:

Meena’s Ribbon = 50 cm

Reena’s Ribbon = 110 cm

∴ Reena’s Ribbon is longer.

Activity 6 (Text Book Page No. 48):

Measure the length of following things in your class room using metre tape and fill in the boxes.

Answer:

Activity to be done by students.

Try this (Text Book Page No. 48):

a. Centimeter _____ Meter

Answer:

<

b. Meter _____ Kilometer

Answer:

<

c. Kilometer _____ Centimeter

Answer:

>

Practice (Text Book Page No. 49):

Match the objects with the appropriate units of measuring their length.

Answer:

Activity 7 (Text Book Page No. 49):

Estimate the length of the following objects and verify with actual length.

Answer:

Activity to be done by students.

Practice (Text Book Page No. 50):

Question 1.

Circle the odd one.

1. mm

2. cm

3. m

4. cubit

Answer:

4. cubit

Question 2.

Fill in the blanks.

a. 1 meter = _____ cms

Answer:

100

b. 2 meter = _____ cms

Answer:

200

c. 3 meter = _____ cms

Answer:

300

d. 4 meter = _____ cms

Answer:

400

Question 3.

Match the following.

10 millimeters | 1 kilommeter |

100 centimeters | 1 centimeter |

1000 meters | 1 meter |

Answer:

Question 4.

Write all the non-standard units.

Answer:

- Finger span
- Hand span
- Cubit
- Pace
- Foot span

Question 5.

Write all the standard units you know.

Answer:

- Millimeter
- Centimeter
- Meter
- Kilometer

Question 6.

Write in short form,

a. millimeter : _____

Answer:

mm

b. meter : _____

Answer:

m

Question 7.

Write the given units in order.

Ascending order: _____, _____, _____, _____

Descending order: _____, _____, _____, _____

Answer:

Ascending order: mm, cm, m, km

Descending order: km, m, cm, mm.