The Tens Digit
Sam has lots of blocks. Can Sam count them fast?
1st Grade MathHow Many Tens?
Sam makes stacks of 10. Each stack is one ten. How many tens do you see?
Sam has 3 stacks. Each stack is 10. That is 3 tens.
Tens Make a Number
3 tens and 0 ones = ?
Sam has 3 tens and 0 ones. What number is that?
3 tens is 30. The tens digit is 3. The ones digit is 0.
Let's Remember
The Tens Digit
2 tens = 20
5 tens = 50
9 tens = 90
The tens digit tells how many tens.
5 tens = 50
9 tens = 90
The tens digit tells how many tens.
To count fast, count the tens!
Count the Tens!
Each stack is 10. What number is this?
5 tens and 0 ones is 50. Count by tens: 10, 20, 30, 40, 50.
Solve It!
70 = ? tens
How many tens are in 70?
70 has 7 tens and 0 ones. The tens digit is 7.
Word Problem
Meg has 4 bags. Each bag has 10 shells. How many shells in all?
4 bags of 10 is 4 tens. 4 tens is 40 shells.
What Goes in the Blank?
6 tens = ?
6 tens and 0 ones is equal to what number?
6 tens is 60. The tens digit is 6. The ones digit is 0.
Tens on a Line
Count by tens. What number is 8 tens?
8 tens is 80. Count: 10, 20, 30, 40, 50, 60, 70, 80.
Challenge!
90 is the same as...
90 has a 9 in the tens spot and a 0 in the ones spot.
90 = 9 tens and 0 ones.
Think About It
What could you count by tens at home?
Great Work!
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