Subtraction

1. Subtraction Across Zeros

2. Bradie had a treasure chest with 300 gold coins. He had to pay his shipmates 128 gold coins before he could bury the treasure chest. How many gold coins did Bradie have to bury? Bradie the Pirate

3. 172 300 gold coins in treasure chest 128 gold coins for shipmates How many gold coins to bury? 300 – 128 = _____ How many hundred mats do we have now? There are 172 what? Now subtract 2 ten strips. Let’s record that. Record the 7 ten strips. Record the 2. Now subtract 8. How many tens strips do we have now? Now we can get some ones? Let’s record that. Let’s record that. How many hundred mats are left? What does that look like? How many ones do we have now? Let’s record that. Where can we get some tens so we can get more ones? Can we get ones from the tens? Let’s see what that looks like. Record the 1 hundred mat. How many tens strips do we have now? Where can we get more ones? Can we take 8 away from 0? What does that look like? How many ones are left? Write the answer in the sentence. Subtract the hundred mat. How many ten strips are left? 9 10 2 10 Stack the problem. Write an equation. Write a sentence. What do we know? 3 0 0 - 1 2 8 1 7 2 Bradie has ______ gold coins to bury. gold coins

4. White Board Subtract on your marker board. 1 0 0 - 3 2

5. White Board Subtract on your marker board. 2 0 0 - 1 8

6. White Board Subtract on your marker board. 4 0 0 - 1 7 7

7. White Board Subtract on your marker board. 3 0 0 - 1 4 5

8. White Board Subtract on your marker board. 3 0 6 - 2 5 9

9. White Board Subtract on your marker board. 5 0 2 - 3 4

10. White Board Subtract on your marker board. 8 0 4 - 4 3 6

11. Subtract Across Zero 6 0 4 - 1 8 7 5 0 0 - 2 3 6