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Tuesday, July 7, 2020

Class 4 Maths Chapter - 2 A Trip To Bhopal Practice work

Today Sugandha is very excited. All the children of her school are going on a trip to Bhopal with their teachers. Ms. Meenakshi and Mr. Rakesh are talking about the number of buses needed.

Ms. Meenakshi–We will need 4 buses.

Mr. Rakesh –I think we need at least 5.

Ms. Meenakshi –Each bus has 50 seats.

Mr. Rakesh – Let us see how many children are going.

ClassNumber of children
I33
II32
III42
IV50
V53
  Total 
  • So there are a total of children going.
  • If they get 4 buses, how many children will get seats? 
  • Will there be any children left without seats?

Children should be encouraged to estimate first and then find out the answer using any method they want. It is important to discuss the methods children use to solve a problem.

Waiting for the Buses

Sahiba jumps out of the line to see if the buses are coming. She shouts loudly – Hey! I can see them. Run! Grab the window seats.

Many children start jumping in excitement. But ..........

Now there is an argument.

Each mini bus can take 35 students. How many mini buses are needed? 

The Journey Begins

As the buses start moving, children sing at the top of their voices. Some look outside to enjoy the view of the green fields and the hills.

Indra–When will we reach Bhopal?

Ms. Asha – If we don't stop anywhere, we should reach there in 2 hours, that is around ______ o' clock.

Manjeet – Is it very far?

Mr. Bhimsen – It is about 70 km.

Ruby – Are we going to stop anywhere?

Mr. Rakesh – May be at Bhimbetka, about 50kmfrom here.

  • If they go to Bhimbetka, they will reach there
  • – Before 10 o'clock

    – Between 10 o'clock and 11 o' clock

    – After 11 o' clock

As they are talking, Bahadur shouts–Hey! look at the Narmada.

Everyone looks out of the windows.

Ruby – Wow! it is soooo long and so wide!

Let us guess how wide it is.

Gopi – Uhm---m, 100 metres? No, it is much more. Can't say.

Victoria – It must be more than half a kilometre.

Ms. Asha – Look, it is written – 'This bridge is 756.82 metres long'. So we can guess that the Narmada must be about 500 metres wide at this place.

  • Was Victoria right ?

Sadaf – I just can't imagine 500 metres.

Ms. Asha – See, our bus is about 5 metres long. Imagine how many buses can stand in a line on this bridge.

  • Have you ever crossed a long bridge? About how many metres long was it? ____________

Everyone looks down at the river.

Mr. Rakesh–The water level now is quite low. It must be about 40 metres below the bridge.

Ms. Asha – But in the rainy season, the water had risen. Then it was just about 15 metres below the bridge.

  • What is the difference between the water level of the Narmada in the rainy season and now?  metres.

The children discuss about the river for some time. ......

Suddenly, the bus stops with a jerk.

Oh! The petrol pump. Two buses need to be refilled.

The buses stand in a line. Children are sticking their necks out to see how diesel is filled in the bus. Some children have got down to look more closely.

  • Each bus takes about 15 minutes to refill and there are two buses to be refilled. So they stop there for about  minutes, which means they are late by about  minutes late
  • Look in the picture and find the price of 1 litre of diesel. 

As the buses are being refilled, some children go to the toilet near the petrol pump.

How much time did Aman take to come out of the toilet? 

To Bhimbetka

After the buses are refilled, the journey starts again. Now the children are told that they are stopping at Bhimbetka.

Anjan – What is Bhimbetka?

Ms. Raina – It's a place with lots of caves and cave-paintings made by people ten thousand years ago.

Sumonto – Ten tho....uu....saa ...nd years! I cannot even think of one thousand years back!

Gopi – Oh! one thousand years is a big thing, I can't even think of one hundred years.

Gauri – I can think of 100 years because my father's grandmother is 100 years old.

Manjeet – That means those caves are almost hundred great grandmothers old!!

Everybody bursts into laughter – Ha! Ha! Ha!

Now the children are really excited to see the cave-paintings. It is about 11 o' clock when they reach Bhimbetka.

Shankar – This painting also has bisons. Hey, I got

Shankar – This painting also has bisons. Hey, I got an idea. I will count the and you count the deer in the paintings.

Bonomala – I will count people. Let us see which are the most – , deer or people.

  • How many more deer are there than bisons? 

But Bonomala is the happiest because the number of people is even more than the number of deer and bisons together. Her count is less than 200.

  • How many people must Bonomala have counted? 214 / 154 / 134 / 177

The guide tells them that there are 600 cave-paintings in all.

It is time to leave Bhimbetka.

  • They have spent 1 hour there. What time is it? 

They are now moving towards Bhopal. They should reach there in less than 1 hour, at about  o' clock.

Lunch Time

The children are hungry by this time so they take out their lunchpacks. Biscuits, oranges and bananas are also distributed in all the buses.

Each child is to be given 1 orange, 1 banana and 5 biscuits.

All the children take oranges and biscuits but 38 children do not take bananas.

  • How many oranges, biscuits and bananas are distributed?

Manjeet and Bhanu quickly finish their lunch and start asking puzzles to pass the time.

Manjeet – Tell me the number which is exactly between 100 and 150.

Bhanu – 120 ... no, 130 ... no it is 125.

Manjeet – Right. OK! You ask now.

Other children join in. Everyone is asking puzzling questions.

Children can be asked to solve many more similar questions or puzzles, both orally and in writing. They should also be encouraged to explain the strategies they use.

Can you solve these? Try them out.

Which Boat do We Take?

They are so lost in puzzles that they do not notice they have reached the lake. It is a very big lake with a small island in it.

The lake looks very beautiful at this time. There are a lot of ducks making a loud noise. Some children give them popcorn.

Now comes the exciting part! It is time to go for boating. They have to choose which boat to take. But that is not easy.

There are different kinds of boats. Each has a different ticket price, and also different trip times.

Based on the table showing ticket rates, trip time etc. some questions are given in the book. Children should be motivated to make many more questions themselves

  • Indra and Bhanu first went in the motor–boat, and then took the oar-boat.
  • How much did they pay for both the boats? Rs 

    How much time did they get for both rides?  min

  • One group of children went for the double–decker trip. They paid Rs 450 in total. How many children went for the double–decker trip? 
  • Which boat makes two trips in 1 hour?
  • Which boat gives them the most time taking the least money?
  • Javed went twice for boating. He paid a total of Rs 40. and boated for 50 minutes. Which two boats did he take? ________

Time to Return

Children enjoy different boat rides till 4 o'clock. It is time to return. Now they will not stop anywhere and reach back in two hours.

So, they should reach Hoshangabad by  o'clock.

Find out

Have you ever been on a school trip? How many children were there in all? How did you go and how far? How much time did it take? Try to find out the cost of travel for each child.

PRACTICE TIME
  1. There are four very old cave-paintings. Mark the oldest.
  2. a) 4200 years old           c) 8500 years old

    b) 1000 years old           d) 1300 years old

  3. One bus can carry 48 children. How many children can three buses carry? About–
  4. a) 100           b) 200           c) 150

  5. Which pair of numbers add to make more than 500?
  6. a) 152 and 241           c) 99 and 299

    b) 321 and 192           d) 401 and 91

  7. What happened at what time? Draw lines to match.

Class 4 Maths Chapter - 3 Tik Tik Tik

Pamposh and Shazia were discussing whose home is farther from school.


PRACTICE TIME
  1. Three friends read time from a clock. Who is right?
  2. Show the following times in the clock:
  3. Do you like sky watching? If yes, then this one should interest you:

    a) At what time does the sun rise at your place?_____

    b) When does the sun set?______ 

    Dose the sun rise and set at the same times every day?

    Look at a newspaper and see the time of sunrise and sunset in different months.

    Look at the photo and guess the time at this place.

    This photo was taken in Paris, France. In Paris the sun sets after 9 pm at night during summer. This photo was taken at night! But in winter it becomes dark here by 4 pm in the evening.

  4. Find out
  • How long will it take the minute hand to move from
  • a)min

    b)min

    c) min

    d) min

  • Draw where the hands will be:
  • How long does your school assembly take? _________

How long is your lunch break? _________

How long is your games period? _________

Is it the same as all the other periods? _________

  • How many minutes can these activities take? Make a guess and then check at home
  • Activity Time
    • In one minute, how many times can you –
    • a) Snap your finger _______________

      b) Skip a rope _______________

      c) Jump up and down _______________

      d) _______________ _______________

      Write more such fun activities in this column.

      Here is another challenge for you. How long can you–

      a) Speak non-stop _______________

      b) Stand on one leg _______________

      c) Sing 'Aaaaa....' without a break ______

      How long do you take to–

      a) Run a 50 metre race ______________

      b) Collect 50 pebbles from the ground ______________

      c) Count 1 to 100 ______________

    • Let's look at a clock again! Solve this one–
    • a) The minute hand started from '2'. How many minutes will it take to come back to '2' again? _______________

      b) What happens to the hour hand? Does it also move? How long will it take to move from one number to the next?

      c) Look around you and list the activities that take about one hour to complete.

      1. _________________
      2. _________________
      3. _________________
      4. _________________
      5. _________________

      How long does it take to cook dinner at home?

      More than an hour/less than an hour.

      Ask your father if he can cook as fast as your mother does.YES/NO

      Which games take less than an hour to finish? __________________________

      How long does a football match take?

      Children will enjoy doing activities to see all the things they can do in one minute. Observing activities at home will give them a sense of time and also help them value the effort of others

    Rani's Diary

    Mark these in the correct order on Muniya's Time Line.

    • Muniya got her first tooth in September. How many months old was she then? How many months have passed from March to September? 
    • How old was Muniya, when

      (a) she first sat up? _________________

      (b) she got her first tooth? _________________

    • What did she do first –
    1. walking/eating a banana?
    2. crawling/standing?

    Rani had a pet puppy. After 2 weeks it opened its eyes. She watched it grow like this:

    • Now make a time-line of this dog's life in your notebook.
    • Note the differences between Muniya and Rani's puppy:
    PositionMuniya(age)Puppy(age)
    Started walking          
    Ate food for the first time          
    Got the first tooth          

    Find out

    Do all animals grow at the same speed?

    Discuss about the growth of–

    1. A hen
    2. A cow
    3. A bird

    Draw pictures of the baby animal and the big animal.

    Here are the pictures of grandfathers posing for a photograph. Who looks the oldest to you?

    • How much older is Appu’s grandfather than Rani’s grandfather? 
    • Will Chuchoo’s grandfather ever grow as old as Appu’s grandfather? 
    • How much younger is Chuchoo rat’s grandfather than Rani’s grandfather? 

    This is a good opportunity for children and teachers to find out about the life spans and growth patterns of different animals. The idea is to compare and discuss without having to memorise any such information

    Holidays are Fun!

    Atif's holidays had begun. He was very excited. He had made some wonderful plans and wanted to tell his cousin Shabana. So he wrote her a letter–

                                                                                                                    Ajmer

                                                                                                                  1/5/06

    Dear Shabana aapa,

    Hello!

    How are you? I am fine here. Aapa, my holidays have started from today! I am going to my Nani's place on 5/5/06. I will be back on 20/5/06. My school will reopen on 30/6/06. When does your school close? Why don't you come here?Wewill have great fun!

    Bye for now                                                                                                              Atif

    Shabana who stays in Nagpur, got this letter on 6/5/06. She wrote back to Atif–

                                                                                                                    Nagpu

                                                                                                                  7/5/06

    Dear Atif,

    Hello!

    I am doing well here. I got your letter yesterday. Happy holidays! My school will close on 1st June 2006. It will reopen on 10th August. I will go on a school trip to Goa and will return on 7/6/06. I will try to come to Ajmer afterthat.

    Bye                                                                                                               Atif

    Atif wrote his letter on 1/5/06. You remember how we write a date in numbers?

    1/5/06 is 1 May 2006.

    Now write which dates these stand for –

    5/5/06 ___________________________

    20/5/06 ___________________________

    7/6/06 ___________________________

    1/1/07 ___________________________

    Write these dates in numbers.

    1 June 2006 _____________________________

    30 May 2006 _____________________________

    10 Aug 2007 _____________________________

    • How long did it take the letter to reach from Ajmer to Nagpur?days
    • How many days will Atif spend at his Nani's place? 
    • Fill in the table:

    Who has got longer holidays–Shabana or Atif?

    • Which long holidays do you get in school? Fill the table.
    Occasion         Dates
    From        To
    Number of days
    Summer Holidays                                                                            
    Autumns Break                                                                            
    Winter Break                                                                           
    Holidays after the exam                                                                            

    On 15 May 2006 Chandran went to a shop to buy butter. He checked the packet to see if this butter was safe to eat.

    It was written on the packet– Best before 180 days from the date of packing.

    Then he checked the date of packing. It was 15/01/06.

    Help him find out if he should buy this butter or not.

    – In which month was the butter packed? 

    – Which month will it be 180 days after 15/01/06? 

    – Can Chandran eat it on 15th May 2006? 

    Do you ever check the date of packing of things you buy?

    Have you seen medicines which have the expiry date written on them? It tells you after which date it is unsafe to take the medicine.

    Find Out

    • Which are the other things that come with an expiry date?
    • On a cough syrup it was written:

      Mfg. date       07/03

      This shows it was made in July 2003.

      Exp. Date       07/05

      This shows the month and year till when it is safe to take.

    • What month and year is written as 07/05 ? _______________

    Would it be safe to take the cough syrup in September 2005? __________

    Children are not expected to know the words 'manufacturing' or 'expiry' dates, but only to recognise these as symbols that show when the medicine is made and till when it is safe to take. Teachers could encourage children to read and observe more such dates on different products

    Tutun Missed the Train

    Tutun's school had closed for the summer holidays. He went to his grandma's place. He met a lot of his cousins there. He was enjoying himself and didn't want to go back home.

    Tutun and his parents reached the station at 5:15. But guess what? They had actually missed the train!

    Can you guess why they missed the train?

    Actually the train had left at 5:30 in the morning! Tutun's parents were upset. They asked the station master–

    Time by your watch(12-hour-clock)Time by a 24-hour clock
    1 o' clock in the afternoon13:00 hours
    2 o' clock in the afternoon14:00 hours
    3 o' clock in the afternoon___________
    3:30 in the afternoon15:30 hours
    6 o' clock in the evening___________
    9 o' clock in the evening___________
    12 o' clock in the midnight___________

    Suppose a train leaves at 8:30 at night. The time written on the Railway ticket would be 

    You must have noted the time of sunrise and sunset.

    Write here using am and pm.

    Time of sunrise     
    Time of sunrise     

    Where have you seen a 24-hour clock being used?

    1. ______________________
    2. ______________________
    3. ______________________