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TRANSCRIPT
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MathematicsPrathomsuksa 2
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Addition and
Subtraction
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Adding and Subtracting
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Vocabulary
minus
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plus
Vocabulary
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Vocabulary
change
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Structure
• How many?• How much?
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How many?
• Followed by plural nounFor examples• How many pens do you have?• How many pets do you have?
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• Followed by an uncountable nounFor examples• How much sugar do you have?• How much money do you have?
How much?
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Question
1. How much money did the man give to Carlos?: Two quarter or 50 cents.
2. How many dimes make 50 cents?: 5 dimes
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How many fruits are there in all?
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There are 6 apples and 5 oranges.How many fruits are there in all?
11
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How many fruits are there in all?
14
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Your turn
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11
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15
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15
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16
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How much is it?
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40 ฿ 10฿
40+10 = ?50 ฿
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30 ฿
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Role play• Situation: You are in the toy shop• Direction• Work in pair• One is an shopkeeper and another is a
costumer.• A costumer has 70 ฿• A costumer has to choose 2 things• A shopkeeper has to change money
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ExampleWelcome to SS’ toy.
May I help you?
Yes, please. I would like to buy
toys.
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How much are they?
ExampleA tennis is 12 ฿.A Barbie is 25 ฿.
12+25 = 37 ฿
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I give you
Example
50 – 37 = 13฿
Here is 13 ฿ in change.
Thank you
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12฿ 15฿20฿
35฿25฿28฿
30฿ 24฿ 25฿