Chapter 10: Tenths and Hundredths

Q1Written answer

What was the length of the smallest pencil you have used?

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Solution:-

The length of the smallest pencil I have used is 2 cm.

Q2Written answer

How long is this pencil? Guess _______ cm

NCERT Solutions for Class 5 Chapter 10 Image 1

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I guess the pencil is 3 cm long.

Q3Written answer

Measure it using a scale. How good is your guess?

NCERT Solutions for Class 5 Chapter 10 Image 2

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The length of the pencil measured by using the scale is 3 cm and 6 millimetres (mm), so my guess is near to the correct value.

Here, one centimetre has 10 equal parts. So, each part is one-tenth of a centimetre. One-tenth of a centimetre is called one millimetre (mm).

Q4Written answer

What is the length of this pencil? _______ mm. What is its length in centimetres?

NCERT Solutions for Class 5 Chapter 10 Image 3

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The length of the given pencil is 6mm, and its length in centimetres is six-tenth of a centimetre, i.e., 0.6 cm.

Q5Written answer

Frogs

Have you seen frogs? Where? How many different types of frogs have you seen? Are all the frogs of the same length?

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Yes, I have seen frogs in ponds, lakes, etc. I have seen many kinds of frogs.

No, not all the frogs are of the same length.

Here are two interesting examples.

NCERT Solutions for Class 5 Chapter 10 Image 4

Q6Written answer

What does 0.9 cm mean? It is the same as ____ millimetres. We can also say this is nine-tenths of a cm. Right?

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Here, one centimetre has 10 equal parts. So, each part is one-tenth of a centimetre. One-tenth of a centimetre is called one millimetre (mm).

So, 0.9 cm is the same as 9 millimetres.

Yes, we can say 0.9 cm is nine-tenths of a cm.

Q7Written answer

So 30.5 cm is the same as cm and millimetre.

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So, 30.5 cm is the same as 30 cm and 5 millimetres.

Q8Written answer

About how many of the big frogs will fit on the 1m scale?

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Solution:-

As we know, 1m = 100 cm.

Then, the length of the big frog is 30.5 cm.

So, 3 big frogs will fit on the 1 cm scale.

Q9Written answer

If they sit in a straight line about how many of the small frogs will cover 1m?

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Solution:-

As we know, 1m = 100 cm.

Then, the length of the small frog is 0.9 cm.

= 100/0.9

= 111

If small frogs sit in a straight line, 111 frogs will cover 1m.

NCERT Textbook Page No. – 135

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