__5th Maths Lesson 1. Fish Tale__

Points:

1. poem in three lines is called a Haiku. These are

popular in Japan.

2. Whales are different from fish. Whales breathe through their noses.

3. Whales give birth to babies, but fish lay eggs. It does not attack humans.

4. Fish like to swim together in the sea in big groups called ‘ schools” of fish.

5. Write the number one thousand. Now write one hundred thousand. So how many zeroes are there in the number onelakh? Easy, isn t it?

6. one hundred lakh = crore

Problems:

1. Fisherman travel about 4 km in one hour. How long will they take to go a distance of 10 km?

2. the speed of about 20 km in one hour of the boat. How far would the motor boats go in three and a half hours?

3. speed of about 20 km in one hour of the boat. How much time will they take to go 85 km?

4. About how much fish in all will each type of boat bring in seven trips?

Boat - Capacity - Speed

Log boat - 20 - 4 km per hour

Long tail boat - 600 - 12 km per hour

Motor boat - 800 - 20 km per hour

Machine boat - 6000 - 22 km per hour

5. About how far can a motor boat go in six hours?

6. If a long tail boat has to travel 60 km how long will it take?

7. Mini sells sardines at ` 40 a kg’’.

Gracy sells sword-fish for ` 60 a kg’’.

Floramma sells prawns for ` 150 a kg.

Karuthamma sells squid for ` 50 a kg.

Fazila sells ‘‘This fish weighs 8 kg. I will sell the whole for ` 1200’’.

7. 1) At what price per kg did Fazila sell the kingfish?

7.2) Floramma has sold 10 kg prawns today. How much money did she get for that?

7.3) Gracy sold 6 kg sword fish. Mini has earned as much money as Gracy. How many kg of sardines

did Mini sell?

7.4) Basheer has ` 100. He spends one-fourth of the

money on squid and another three-fourth on prawns.

7.4. How many kilograms of squid did he buy?

7.5. How many kilograms of prawns did he buy?

8. Twenty fisherwomen Each saves ` 25 every month and puts it in the bank.

8.1. How much money does the group collect each month?

8.2. How much money will be collected in ten years?

9) Gracy took a loan of ` 4000 to buy a net. She paid back ` 345 every month for one year. How much money did she pay back to the Bank?

10) Jhansi and her sister took a loan of ` 21,000 to buy a log boat. They paid back a total of ` 23,520 in one year. How much did they pay back every month?

11. When fresh fish is dried it becomes 1/3 its weight. In one month they plan to dry 6000 kg of fresh fish. How much dried fish will they get in a month?

12. Jhansi — I found that for 6000 kg fish we would need 1500 kg salt every month! Its price is ` 2 per kg.

Monthly costs:

a) Salt = 3000

b) Packing and bus charges = 3000

So the total monthly cost of drying,

packing and bus charges =

Answers:

1. 2 1/2 hrs or 2hrs 30 min

2. 70 kms

3. 4 1/4 hrs or 4hrs 15 min

4. H

5. K

6. J

7. 1 150

7.2 1500

7.3 360 /40=9kgs

7.4 25/50= 1/2 kgs

7.5 75/150= 1/2 kgs

8. 1 20*25=

8.2 500*12*10= 60,000

9. 4140

10. 1960

11. 2000 kgs

12. 6000

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