1. Box Method Subtracting Across Zeroes
by Kay McCullough

2. Benchmark Goal Add and subtract whole numbers
N.FL 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. Subtraction across Zeroes
Box Method
Subtraction across Zeroes
500 – 324
4 9 1
5 0 0
-3 2 4 6 1 7

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

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

7. Subtracting across Zeroes
Box Method
Subtracting across Zeroes
3006 – 1277
2 9 9 1 1,

8. Subtracting across Zeroes
Box Method
Subtracting across Zeroes
6003 – 2915
5 9 9 1 3,

9. Subtracting across Zeroes
Box Method
Subtracting across Zeroes
8008 – 4539
7 9 9 1
3 ,

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

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

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