# COMPARING WEIGHT

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CLASS: Basic 3

SUBJECT: Mathematics

TOPIC: Weight

CONTENT:

Weight describes how heavy or light an object is. We can compare objects by using their weight because, some objects are heavy while some objects are light.

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COMPARING WEIGHT

1. A bag of sugar weighs more than a loaf of bread.

2. An eraser weighs less than a cup.

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We can measure or know the weight of an object by using weighing scales. Examples of different weighing scales are:

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All of these are used to measure the weight of different objects.

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STANDARD UNITS OF WEIGHT

(i) The kilogram (kg) is used as a unit when we weigh heavy objects like bag of rice, bag of cement, etc.

(ii) The gram (g) is used when we weigh lighter objects like pencils, rulers, etc.

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Relationship Between Grams (g) and Kilograms (kg).

When we have 1000g = 1kg (that is 1000grams is the same as 1kilogram)

We can change grams to kilograms and change kilograms to grams.

Know that: When you want to change grams to kilograms you divide by 1000.

Example: change 2000g to kilogram

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2000 Ã· 1000 = 2kg

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Also know that: When you want change kilograms to grams you multiply by 1000.

Examples: (i) change 2kg to grams.

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2 Ã— 1000 = 2000g

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(ii) Change 1/4kg to grams.

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1/4 Ã— 1000

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1 Ã— 1000/4

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1000/4 = 250g

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Compare these objects by using (more than or less than)

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1. A bottle of water weighs ______________ An empty bottle.

2. A pineapple weighs ______________ an orange.

3. A hen weighs ____________ a dog.

4. An exercise book weighs ____________ your school bag.

5. Change 4000g to kilograms

6. Change 7kg to grams

7. Change 1/2 kg to grams

8. Change 2500g to kilograms.