Box Method Subtracting Across Zeroes

1. Box MethodSubtracting Across Zeroes by Kay McCullough

2. Benchmark Goal Add and subtract whole numbers N.FL.04.08 Add and subtract whole numbers fluently.

3. What do you do when You need to borrow, but the neighbors are zeroes? 4,000 -1232

4. Box Method Subtraction across Zeroes 500 – 324 4 9 1 5 0 0 -3 2 4 6 7 1

5. Box Method Subtraction across Zeroes 300 – 136 2 9 1 3 0 0 - 1 3 6 4 6 1

6. Box Method Subtraction across Zeroes 700 – 382 6 9 1 7 0 0 - 3 8 2 1 8 3

7. Box Method Subtracting across Zeroes 3006 – 1277 2 9 9 1 3 0 0 6 -1 2 7 7 1,7 2 9

8. Box Method Subtracting across Zeroes 6003 – 2915 5 9 9 1 6 0 0 3 - 2 9 1 5 3, 08 8

9. Box Method Subtracting across Zeroes 8008 – 4539 7 9 9 1 8 0 0 8 - 4 5 3 9 3 ,4 6 9

10. Box Method Subtraction across Zeroes 308 – 136 2 1 3 0 8 -1 3 6 1 7 2

11. Box Method Subtraction across Zeroes 5900 – 899 5 8 9 1 5 9 0 0 - 8 9 9 5,0 0 1

12. Box Method Subtraction across Zeroes 805 – 622 7 1 8 0 5 - 6 2 2 1 8 3