Take Away Tens!
Sam has 50 shells. He gave 20 to Meg. How many shells are left?
1st Grade MathStep 1: See the Tens
One block is one ten. 50 is 5 tens. How many tens is 50?
50 is 5 tens. See the 5 blocks!
Step 2: Take Off 2 Tens
We subtract. Take off 2 tens. 5 tens - 2 tens = ?
5 tens take away 2 tens is 3 tens. 3 blocks are left!
Step 3: What is Left?
3 tens are left. So 50 - 20 = ?
3 tens is 30. So 50 - 20 = 30. Check it: 30 add 20 is 50!
Think Tens!
How to Take Away Tens
Step 1: See the tens. 50 is 5 tens.
Step 2: Take off the tens. 5 - 2 = 3.
Step 3: Name it! 3 tens is 30.
Step 2: Take off the tens. 5 - 2 = 3.
Step 3: Name it! 3 tens is 30.
30 is less than 50. Sam has 30 shells left!
Do the Math!
70 - 30 = ?
Think: 7 tens take away 3 tens.
7 tens take away 3 tens is 4 tens. 70 - 30 = 40.
Rock Math!
Dot has 60 rocks. She gave 40 to Kit. How many rocks are left?
6 tens take away 4 tens is 2 tens. 60 - 40 = 20.
Fill the Blank!
90 - ? = 50
We took some tens from 90. Now we have 50. What did we take?
90 - 40 = 50. Check it: 50 add 40 is 90!
Hop Back on the Line!
Go back 3 hops of ten from 80. 80 - 30 = ?
Hop back: 70, 60, 50. So 80 - 30 = 50.
Big Task!
Fox has 80 nuts. He gave 30 to Hen. He gave 30 to Bug. How many nuts are left?
80 - 30 = 50. Then 50 - 30 = 20. Fox has 20 nuts left.
When can you take away by tens? What can you take away at home?
You Did It!
0/8
correct
subtract
add
tens
less than