Convert from expanded form

3rd class Convert between place values by Delta publications

key notes :

🎈 Understanding Expanded Form:

• Definition: Expanded form is a way to break down a number by showing the value of each digit according to its place value.
• Example: The number 453 in expanded form is written as 400 + 50 + 3.

🎆 Components of Expanded Form:

• Hundreds Place: Represents the number of hundreds (e.g., in 400, the digit 4 is in the hundreds place).
• Tens Place: Represents the number of tens (e.g., in 50, the digit 5 is in the tens place).
• Ones Place: Represents the number of ones (e.g., in 3, the digit 3 is in the ones place).

🎇 Steps to Convert from Expanded Form to Standard Form:

Identify the Place Values:

Look at each part of the expanded form and identify the hundreds, tens, and ones.

• Example: For 400 + 30 + 5, 400 is the hundreds, 30 is the tens, and 5 is the ones.

Add the Place Values:

Add all the values together to form the standard number.

• Example: 400 + 30 + 5 = 435.

Write the Number in Standard Form:

Write the final result as a single number.

• Example: 435 is the standard form of 400 + 30 + 5.

🧨 Examples for Practice:

Example 1: Convert 300 + 20 + 7 to standard form.

• Solution: 300 + 20 + 7 = 327.

Example 2: Convert 500 + 40 + 2 to standard form.

• Solution: 500 + 40 + 2 = 542.

Example 3: Convert 600 + 50 + 8 to standard form.

• Solution: 600 + 50 + 8 = 658.

✨Tips for Converting from Expanded Form:

• Check Each Place Value: Ensure you correctly identify and place the hundreds, tens, and ones in the right order.
• Line Up Digits: When adding the place values, line up the digits according to their place values (hundreds with hundreds, tens with tens, etc.).
• Start with the Largest Place Value: Begin with the largest place value (hundreds) and work your way to the smallest (ones).

🎉 Common Mistakes to Avoid:

Misplacing Digits: Make sure each digit is in the correct place value position when writing the standard form.

Forgetting Zeros: If a place value is missing in the expanded form (e.g., no tens), remember to place a zero in that position in the standard form.

• Example: 400 + 6 should be written as 406, not 46.

🎊 Relating Expanded Form to Real-Life Situations:

Money: Think of expanded form as counting money, where you add different denominations together.

• Example: $500 + $30 + $2 is the same as $532.

Measurement: Consider expanded form in terms of measurements.

• Example: 700 cm + 50 cm + 9 cm = 759 cm.

Learn with an example

Let’s practice!