NCERT solutions for Math - Magic [English] Class 5 chapter 10 - Tenths and Hundredths [Latest edition]

There are two beautiful lakes near a village. People come for boating and picnics in both the lakes. The village Panchayat is worried that with the noise of the boats the birds will stop coming. The Panchayat wants motorboats in only one lake. The other lake will be saved for the birds to make their nests.

• A longer boundary around the lake will help more birds to lay their eggs. So which lake should be kept for birds? Which lake should be used for boats?

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

How long is this pencil ? Guess _______ cm

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

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

Have you seen frogs? Where? How many different types of frogs have you seen? Are all the frogs of the same length? Here are two interesting examples.

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

So 30.5 cm is the same as ______ cm and ______ millimetre.

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

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

Length of the nail ______ 2 cm and ______ mm or 2. ______ cm.

The length of this lady's finger is _____ cm and _____ mm. We can also write it as ______ cm.

Using the scale on this page find the difference in length between candle 1 and candle 3.

Guess the lengths to draw these things. Ask your friend to draw the same. After you make the drawing use a scale to measure the length. Whose drawing showed a better guess?

Which line is longer? A or B? Measure each line and write how long it is in centimeters. How good is your guess?

Which line is longer? C or D? Measure each line. How good is your guess?

Guess whose tail is the longest. Now measure the tails. How good is your guess?

What is the length of a 100 rupee note? Guess. Now measure it using a scale.

Now guess the length and width of many other things. Measure and find the difference between your measure and your guess.

How many paise does a matchbox cost? ______

How many matchboxes can be got for Rs 2.50? ______

How many rupees does the soap cost? ______

Arun wanted to buy soap. He has a five-rupee coin, 2 one-rupee coins, and 4 half-rupee coins. Write in rupees what money he will get back.

An egg costs two and a half rupees. How much will one and a half dozen cost?

How many pens can Kannan buy? How much money is left?

The price of the two pens is Rs _____. Can she buy two pens?

Match each yellow box with one green and one pink box.

What part of this sheet is coloured blue? ___ /10

Now 3/100 of the sheet is black. We can say the 0. ______ sheet is black.

How many white boxes are there in the sheet?

What part of the second sheet is white?

Make your designs.

Make a nice design by colouring 0.45 part of this square red.

make your designs.

Use is four colours. Each colour should cover 0.05 of this square.

What part of the sheet is green?

Which colour covers 0.2 of the sheet?

Now, look at the second sheet. Each strip is divided into 10 equal boxes. How many boxes are there in all?

Is each box 1/100 part of the sheet?

How many blue boxes are there?

Can we say 10/100 = 1/10 = 0.10 = 0.1?

Is blue equal to 10/100 of the sheet? We saw that blue is also equal to 1/10 of the sheet. We wrote it as 0.1 of the sheet.

Can we write 10 paise as 0.1 of a rupee?

How many boxes are red? What part of the sheet is this? 15/______

Can we also write it as 0.15 of the sheet?

But how did Anu jump? ______ m and ______ cm.

Who is the winner in the long jump?

Write the names of the I, II, and III winners on this stand.

Difference in size
Do this for yourself and find the difference.

What is Dinesh’s height in metres? _____ m _____ cm.

Money from different countries

Have you seen any notes or coins used in any other country?

Money from different countries

Shivam Bank has a chart to show us how many Indian rupees we can get when we change the money of different countries.

(This is the rate on 15-2-2008)
The money of which country will cost the most in Indian Rupees?

Money from different countries

Mithun’s uncle in America had sent him 10 USA dollars as a gift. Mithun used 350 rupees for a school trip. How much money was left with him?

Money from different countries

Majeed’s father is working in U.A.E. He gets 1000 Dirham as salary. Arun’s father who is working in Sri Lanka gets 2000 Sri Lankan Rupees. Who gets more Indian rupees as salary?

Money from different countries

Leena’s aunty brought a present for her from China. It cost 30 Yuan. Find what it costs in Indian rupees.

Money from different countries

Astha wants some Hong Kong Dollars and Won.

• How many Won can she change for Rs 4? For Rs 400?

Money from different countries

Astha wants some Hong Kong Dollars and Won.

• How many Hong Kong Dollars can she change for Rs 508?

Which city is cool?

The temperature in these cities was also noted at 3 am on the same day. Look at the table

• Which place had the lowest temperature at 3 am? Imagine yourself being there and describe how it would feel.

Which City Is Cool?

The temperature in these cities was also noted at 3 am on the same day. Look at the table and answer the question.

• What is the difference between the temperatures at 3 pm and 3 am in Chennai? In Bhopal?

Kiran went shopping with Rs 200. Look at the bill. The shopkeeper forgot to put the point correctly in the prices. Put the point in the correct place and find out the total amount of the bill.

Which city is cool?

The temperature in each city was noted at 3 p.m. on 16 January 2008.

• Which place had the highest temperature at 3 pm? Which place is the coolest at that time?

Which city is cool?

The temperature in each city was noted at 3 pm on 16 January 2008.

• How much higher is the temperature in Mumbai than that in Srinagar?

Which city is cool?

The temperature in each city was noted at 3 pm on 16 January 2008.

• How many degrees will the temperature need to rise for it to reach 40°C in Thiruvananthapuram?

Which city is cool?

The temperature in each city was noted at 3 pm on 16 January 2008.

• How much lower is the temperature of Kolkata than that in Chennai?