A two-digit number is composed by combining tens and ones, so that, for example, 4 tens and 7 ones make 47, represented as ; the position of each digit determines its value. This understanding includes numbers from 10 through 99, including numbers with zero ones, and distinguishes a digit’s place value from its face value; it does not extend to hundreds, decimals, or more general place-value systems.
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Detailed Explanation: Compose a two-digit number
To compose a two-digit number, put the tens digit first and the ones digit second.
Example: Compose 4 tens and 7 ones.
- 4 tens means .
- 7 ones means .
- Put the tens and ones together:
So, 4 tens and 7 ones make .
The digit has a face value of 4, but because it is in the tens place, its value is . The digit is in the ones place, so its value is .
Learn by doing: Compose a two-digit number
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Place Value - Expanded (Words) to Normal Form
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This Worksheet Includes:
- Place Value - Expanded (Words) to Normal Form
- Base 10 Blocks - Counting - Picture to Number - Tens and Ones
- Base 10 Blocks - Counting - Number to Picture, Tens and Ones
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