Convert to/from a number

key notes :

🎈1. Understanding Conversion:

• Conversion in Numbers: Converting between different forms of numbers, such as from words to digits or from digits to expanded form, helps students understand numbers better.
• Importance: Being able to convert numbers strengthens understanding of place value and number sense.

🎇2. Converting Words to Numbers:

• Read the Number Carefully: Pay attention to the words and identify the place value of each part.
  • Example: “Three hundred twenty-five” is written as 325.
• Step-by-Step Process:
  1. Identify the hundreds, tens, and ones in the word form.
  2. Write the digits in the correct place value positions.
• Practice Examples:
  • “One hundred forty-seven” → 147
  • “Five hundred twenty-three” → 523

🧨3. Converting Numbers to Words:

• Read Each Digit’s Place Value: Start from the left (largest place value) and name each digit according to its place value.
  • Example: 678 is read as “Six hundred seventy-eight.”
• Step-by-Step Process:
  1. Identify the digits and their place values.
  2. Write the number in word form, starting with the largest place value.
• Practice Examples:
  • 245 → “Two hundred forty-five”
  • 902 → “Nine hundred two”

✨4. Converting Numbers to Expanded Form:

• Expanded Form: Breaking down a number into the sum of its place values.
  • Example: 764 in expanded form is 700 + 60 + 4.
• Step-by-Step Process:
  1. Identify each digit’s place value.
  2. Write the number as the sum of these values.
• Practice Examples:
  • 583 → 500 + 80 + 3
  • 409 → 400 + 0 + 9

🧨5. Converting from Expanded Form to Standard Form:

• Standard Form: Writing the number as a single whole number.
  • Example: 300 + 40 + 5 is written as 345.
• Step-by-Step Process:
  1. Add the values together.
  2. Write the number in standard form.
• Practice Examples:
  • 600 + 70 + 8 → 678
  • 200 + 5 → 205

Learn with an example

Let’s practice!