Sk Kayan Sitiawan Dokumen Sbt Dan Modul Sbt

EXERCISE 1 Name : ______________________ Class: __________ Date : _________ A.

Convert the following to grams (g). Example: 2.8 kg = 2.8 x 1 000 g = 2 800 g

i.

0.4 kg

=

g

ii.

1.5 kg =

g

iii.

3.5 kg

=

g

iv.

7.2 kg =

g

v.

6.9 kg

=

g

vi.

2.58 kg =

g

vii. 9.41 kg =

g

viii. 5.73 kg =

g

ix.

A bag of pears has a total mass of 4.149 kg. The mass in grams is __________ g.

x.

The mass of a laptop is 3.204 kg. What is the mass in grams? Answer : ___________ g.

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B.

Convert the following to grams (g) Example: 2 kg 300 g = 2 300 grams (g)

i.

3 kg 400 g =

g

ii. 1 kg 900 g =

g

iii.

4 kg 300 g =

g

iv. 7 kg 600 g =

g

v.

8 kg 580 g =

g

vi. 2 kg 870 g =

g

vii. The mass of three durians is 6 kg 680 g. Write the mass in grams. Answer : ___________ g viii. Twenty mangoes weigh 3 kg 265 g. The mass of the mangoes written in grams is __________ g. ix.

Three dictionaries have the total mass of 5 kg 24 g. The mass of the dictionaries is _________ g

x.

The mass of a school bag was measured. It weighed 7 kg 8 g. Convert the mass to grams. Answer : ___________ g.

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C.

Convert the following to kilogram (kg) Example : 2 kg 280 g =2 kg + 0.280 kg =2.280 kg

i.

4 kg 100 g = _______ kg

ii. 6 kg 400 g = _______ kg

iii. 3 kg 210 g = _______ kg

iv. 1 kg 750 g = _______ kg

v.

vi. 9 kg 375 g = _______ kg

5 kg 120 g = _______ kg

vii. A pail of cuttlefish weighs 2 kg 184 g. The mass in kilograms is ________kg

viii. What is the equivalent mass of 7 kg 388 g in kilogram (kg)? Answer : __________ kg ix.

Convert the mass of 6 kg 375 g to kilogram. Answer : ___________ kg

x.

The value of 10 kg 9 g in kilograms is _________ kg

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Lesson

: 34

Topic

: Mass

Learning area

: Comparing Mass

Learning objectives : Understand the relationship between units of mass Learning outcomes

: Solve problems involving conversion of units of mass in fraction or decimals

Previous knowledge : Pupils have learnt how to convert the masses of objects from kg to g and vice versa Problems

: Pupils are not able to understand the type of conversion that is needed to be carried out to solve the problem

Vocabulary

: Mass, kilogram, gram, convert, compare

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SUGGESTED ACTIVITIES Step 1. Example 1: Question-Answers based on the flash cards of stories, Redzuan went to a fruit stall and he bought a papaya. 1 The mass of the papaya is kilogram. 2 e.g. i) What did Redzuan buy? ii) What is the mass of the fruit? Point to note: 1 kg = 500 g (refer to the mass conversion table) 2 Example 2: Solve the problem.

If the mass of a chicken is 1.2 kg, what is the mass of 3 chickens of the same size? Give your answer in grams.

1 chicken

1.2 kg

3 chickens

3 x 1.2 kg = 3.6 kg

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Convert the answer to g

3.6 kg = 3 000 g + 600 g = 3600 g

Or

3.6 kg = 3.6 x 1 000g = 3 600 g

Example 3:

The mass of an orange is 125 g. There are 10 oranges in a basket. What is the total mass of the oranges in the basket? Write your answer in decimal of kilograms.

Solution: 125 g x 10 = 1 250 g 1 250 g =

1 250 = 1.250 kg = 1.25 kg 1 000

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Table AKU is also applicable in this solution. kg

g

1

2

5

0

1 250 g = 1.250 kg

Example 4: A box of beef has a total mass of 6750 grams. What is the mass in kilograms? Write your answer in mixed number.

6 750 g = 6 000 g + 750 g = 6 kg +

750 kg 1000

= 6 kg +

3 kg 4

=6

3 kg 4

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EXERCISE 1 Name : ______________________ Class: __________ Date : _________ Solve.

1.

The mass of a watermelon is 2.6 kg. Convert the mass to grams.

2.

Yani caught a fish in the river. It weighs 3.54 kg. What is the mass in grams?

3.

A bunch of grapes has a total mass of 2 500 g. What is the mass of the grapes in kg?

4.

Wai Leong has 20 mangosteens. Each mangosteen weighs 85 g. Find the total mass of the mangosteens in kilograms.

5.

1 The mass of a pineapple is 2 kg 4 The mass in grams is ..

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