🔢 Numeracy and Mathematics
First Level
Primary 2
Primary 3
Place Value: Tens and Ones
Understand that a two-digit number is made of tens and ones.
In the number 23, the 2 means 2 tens (20) and the 3 means 3 ones. So 23 = 20 + 3.
Each digit has a place. The ones place is worth 1 each; the tens place is worth 10 each. 23 is 2 tens and 3 ones.
Base-10 place value assigns each digit a value that is a power of 10 by position. 23 = 2×10¹ + 3×10⁰. This positional system generalises to all larger numbers.
🎨 Visual Guide
✏️ Try This
How many tens and ones make 47?
Answer: 4 tens and 7 ones