Singapore Math: Grade 3a, Unit 1 (part 4) | Summary and Q&A

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May 20, 2008
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Khan Academy
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Singapore Math: Grade 3a, Unit 1 (part 4)

TL;DR

Learn how to represent numbers using place value and understand the value of each digit in a number.

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Questions & Answers

Q: What is place value?

Place value is a system in mathematics that assigns a value to each digit in a number based on its position in the number. It helps determine the magnitude of the number.

Q: How is the table method used to represent numbers?

The table method involves using different colors and shapes to represent the place value of each digit in a number. Each column in the table represents a different place value, such as thousands, hundreds, tens, and ones.

Q: How do you determine the value of each digit in a number using place value?

To determine the value of each digit in a number, you can look at its position in the number and multiply it by the corresponding place value. For example, in the number 3254, the 2 represents 2 thousands, the 5 represents 5 tens, and the 4 represents 4 ones.

Q: How can numbers be written in expanded notation?

Expanded notation is a way of writing numbers by breaking them down into the sum of their place values. For example, the number 3254 can be written as 3000 + 200 + 50 + 4.

Summary & Key Takeaways

  • The content explores how to represent numbers using place value and demonstrates how to read and understand the value of each digit in a number.

  • The table method is used to visually represent the number, with different colors and shapes representing thousands, hundreds, tens, and ones.

  • Multiple examples are provided, demonstrating how to identify the value of each digit in a number and how to read and write numbers in expanded notation.

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