Break apart tens and ones
~10 min
Add tens to tens and ones to ones.
Tens digit tells tens
42
4 tens
2 ones
In a 2-digit number, the tens digit tells how many tens. It is the first digit.
💡 Look at the left digit for tens.
Add tens to tens and ones to ones.
In a 2-digit number, the tens digit tells how many tens. It is the first digit.