Count On, Count Back!
Fox has some nuts. Then he gets more! Can we count to find how many?
1st Grade MathStep 1: Count On to Add
Fox has 5 nuts. He gets 2 more. Say 5, then count on: 6, 7!
5 + 2 = ?
5 + 2 = 7. Start at 5. Count on 2 times: 6, 7. Fox has 7 nuts!
Step 2: Count Back to Subtract
Fox had 7 nuts. He ate 2. Start at 7, then count back: 6, 5!
7 - 2 = ?
7 - 2 = 5. Start at 7. Count back 2 times: 6, 5. Fox has 5 nuts left!
Let's Remember
Counting is a Math Tool!
To add, count on. Go up!
To subtract, count back. Go down!
To subtract, count back. Go down!
Fox says:
Start at the big number. Then count on or count back!
Solve It!
Start at 6. Count on 3 times.
6 + 3 = ?
6 + 3 = 9. Count on from 6: 7, 8, 9. The sum is 9!
Word Problem
Meg has 8 shells. She gets 2 more. How many shells in all?
8 + 2 = 10. Start at 8. Count on: 9, 10. Meg has 10 shells!
Count Back!
Start at 8. Count back 3 times.
8 - 3 = ?
8 - 3 = 5. Count back from 8: 7, 6, 5. The answer is 5!
What Goes in the Blank?
Count on from 4 up to 7. How many counts?
4 + ? = 7
4 + 3 = 7. Count on from 4: 5, 6, 7. That is 3 counts!
Use the Number Line!
Start at 10. Count back 4 times.
10 - 4 = ?
10 - 4 = 6. Count back from 10: 9, 8, 7, 6. You land on 6!
Big Fox Test!
Fox has 9 nuts and gets 5 from Cat. Then he eats 4. How many nuts are left?
First count on from 9: 10, 11, 12, 13, 14. Then count back 4 from 14: 13, 12, 11, 10. Fox has 10 nuts!
Think About It
When can you count on to add at home? Tell a grown-up!
Great Work!
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