6. Fun with Give and Take

Cricket Match

In a cricket match, Sri Lanka made 235 runs.

India has made 123 runs. How many more runs does India need to win?

To win India must make 236 runs.

Runs India needs to win:

236 - 123 = ?

Guess...

To win India needs

(a) more than 100 runs

(b) less than 100 runs

To win India must make 113 runs

Try it Yourself

Geeta had ₹ 368 in her purse.

She bought a book for ₹ 123.

How much money is left in her purse?

Money left in her purse is ₹ 368 - ₹ 123 = ?

Guess...

Money left in Geeta's purse is

(a) more than 200

(b) less than 200

The teacher should discuss with students which number is to be placed above and why.

Can You Help Nabeela?

Nabeela's mother sent her to the market to buy some things. She gave her ₹ 245. Nabeela bought 1 kg ghee for ₹ 127. The shopkeeper gave her back ₹ 98.

(Kilogram is written as kg.)

Did the shopkeeper give her the right amount?

Let's find out.

We cannot take seven 1’s from five 1’s

So borrow 10’s

Now we have fifteen 1’s 

From fifteen 1’s take away seven 1’s. Only eight 1’s left.

Now take away 10’s. Only one 10’s left.

Now take away 100’s. Only one 100’s left.

So tokens left are

The shopkeeper had to give Nabeela ₹ 118.

How much more money should the shopkeeper give Nabeela ?

Practice Time

1. Baby tortoise is 33 years old. Mummy tortoise is 150 years old. How much younger is Baby tortoise than Mummy tortoise?

Age of Mummy tortoise: 150 years

Age of Baby tortoise: 33 years

Baby tortoise is 117 years younger than Mummy tortoise.

2. Arvind has read 69 pages of a story book. Gouri has read 95 pages of that story book. Who has read more pages and how many more?

Teachers should motivate students to decide which operation they have to use to solve a problem. More such exercises can be given where students decide the appropriate operation

3. Reena noted the electricity meter readings of her house. Last month's reading was 118 units. This month's reading is 193 units. How much electricity did she use in one month?

This month's reading _____

Last month's reading _____

She used _____ units of electricity.

4. Khushboo bought a shirt for ₹ 125 and trousers for ₹ 165. How much money did she spend altogether?

Bought a shirt for ₹ _____

Bought trousers for ₹ _____

She spent ₹ _____ altogether.

5. Solve the following: 

17 – 3 = _____

14 + 3 = _____

39 – 10 = _____

12 + 24 = _____

86 – 58 = _____

139 – 110 = _____

237 + 213 = _____

325 – 204 = _____

474 – 136 = _____

642 – 413 = _____

49 + 20 = _____

135 + 146 = _____

6. Check your answers yourself:

Check Rashi's subtraction using addition. Give her a ✓  for every right answer.

7. Fill in the missing numbers in the coloured boxes.

If I take one more mala she will have 40 beads left!

The teacher should encourage students to discuss and correct the wrong answers. Children love to correct others' mistakes (for a change!) and also learn from this process.

Let's Deliver Letters

Postman Uncle is ill today. Let's deliver the letters for him.

Write the correct room numbers on the letters. Then find the rooms in the above building and circle them.

Make a circle on room 455.

The teacher should encourage students to solve the problems mentally using the above chart.

Find the Missing Numbers

Look at the number patterns. Write the missing numbers.

a) 100, 200, 300, _____, _____, 600, _____

b)

c) 50, 100, 150, 200, _____, _____, _____, _____.

d)

e)

f ) 280, 260, 240, _____, _____, _____, _____.

g) 125, 150, 175, 200, _____, 250, _____, _____.

Mental Maths

Practice Time

1. Indu's pencil is 15 cm long. Jyoti's pencil is 8 cm long. Whose pencil is longer? How much longer?

2. Ask your Papa or Mummy

Price of 1 kilogram salt –

Price of 1 kilogram sugar –

Which one is more costly? How much more does it cost?

3. Ajay cooked chapatis in 25 minutes. Then he made daal in 15 minutes. How much time did he take to cook both things?

4. Chanchal sells school sweaters. In 2 days she sold some red, blue and grey coloured sweaters.

Look at the above and answer the following:

(a) How many grey sweaters did Chanchal sell in 2 days?

(b) Did she sell more red sweaters than blue sweaters in 2 days?

(c) How many red and grey sweaters did she sell on the first day - more than 120 or less than 120? Tick ( ✓ ) the right answer.

more than 120 _____

less than 120 _____

(d) How many sweaters in all did she sell on the second day - more than 140 or less than 140? Tick ( ✓ ) the right answer.

more than 140 _____

less than 140 _____

5. Is Sangeeta right?

Sangeeta went to the market with her grandpa.

She looked at the prices and said to her grandpa -

(a) Ghee is ₹ 102 rupees costlier than biscuits. _____

(b) Price of oil and ghee altogether is more than ₹ 200. _____

(c) Price of ghee and 10 kg rice is less than ₹ 300. _____

(d) Oil costs ₹ 40 more than a pack of biscuits. _____

Is Sangeeta right? Mark ( ✓ ) or (  ) in the box.

Can you find this without using paper and pencil?

Story Problems

Nisha and Sonu were making story problems. Nisha said - 13 boys and 14 girls in a class. Sonu, can you make a problem on it?

Sonu wrote There are 13 boys and 14 girls in a class.
How many students are there altogether?

You can also make story problems with your friends. Look at each picture and the words next to it. Write your problem below it.

A. 36 men and 52 women waiting for their turn

B. We have our mid-day meal in 20 minutes and play for 15 minutes.

C. The post office is 1 kilometre from Shahid's home and 2 kilometres from his school.

D. Bunty has read 27 books and Babli has read 34 books.

A. 56 – 37 = ?

10 + 10 – 1 = _____

So 56 – 37 = _____

B. 60 - 45 = ?

5 + 10 = _____

So 60 – 45 = _____

C. 80 - 59

 

_____ + _____ + _____ = _____

So 80 - 59 = _____

 

D. 85 - 63 = _____

E. 84 - 69 = _____

F. 60 - 20 = _____

G. 90 - 50 = _____

All the King's Horses....

Once there was a king who could count only up to 9. Up to what number can you count?

The king loved horses. But he could never count all of them. He kept them in such a way that he needed to count only up to 9 from each side.

How many horses in all did the king have? _____

One day a visitor with 4 horses came there. It was getting dark so he wanted to stay there at night. But the horse-keeper was scared. If the king saw these extra horses he would be very angry! The visitor said - do not worry. The king will never know. So he arranged the horses like this:

How many horses are there now? _____

At night the king came to count the horses. Along each side he counted 9 horses. Ah! That's fine – he said. Then he happily went to sleep.

In the morning the clever visitor tried another trick. He took out his own 4 horses. But he also ran away with some of the king's horses. He left the king's horses standing in this way.

The silly king did not find any horse missing. Can you help him?

 

How many horses are now left? _____

How many of the king's horses were taken away? _____

(Based on a Tamil folk story from the book "Numeracy Counts!")

� ★ Did the visitor have any other way of arranging these twenty horses? Try other ways

Puzzle:-

What numbers are we?

If you add us both you get 100.

The difference between us is also 100.