# Subtracting Across Zeros - PowerPoint PPT Presentation

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Subtracting Across Zeros. Fourth Grade. How can I borrow when the neighbor is a zero?. 704 - 438. Eight cannot be subtracted from four so we have to go to the next door neighbor to borrow. 704 - 438. But what happens when the next door neighbor is the number zero?.

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Subtracting Across Zeros

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## Subtracting Across Zeros

704

- 438

### Eight cannot be subtracted from four so we have to go to the next door neighbor to borrow.

704

- 438

But what happens when the next door neighbor is the number zero?

704

- 438

### How can I borrow when the neighbor is a zero?

704

- 438

When the next door neighbor is a zero, you can’t borrow from it. So, you must continue to the next neighbor to see if you can borrow from it.

### How can I borrow when the neighbor is a zero?

704

- 438

In this problem, the next neighbor is the number seven. We are able to borrow from this neighbor.

10

6

704

- 438

10

6

704

- 438

10

6

704

- 438

9

10

6

704

- 438

9

10

14

6

704

- 438

9

10

14

6

704

- 438

9

10

14

6

704

- 438

2

6

6

300

- 266

### Six cannot be subtracted from zero so we have to go to the next door neighbor to borrow.

300

- 266

When the next door neighbor is a zero, you can’t borrow from it. So, you must continue to the next neighbor to see if you can borrow from it.

300

- 266

In this problem, the next neighbor is the number three. We are able to borrow from this neighbor.

10

2

300

- 266

10

2

300

- 266

10

2

300

- 266

9

10

2

300

- 266

9

10

10

2

300

- 266

9

10

10

2

300

- 266

### We are now ready to subtract!

9

10

10

2

300

- 266

3

4

Now it is your turn to try one!

9

10

10

6

700

- 211

4

8

9

Try another one!

9

10

10

7

800

- 92

7

0

8

Try one more!

9

9

10

4

10

10

5,000

- 174

4,

8

2

6