Subtracting Across Zeros

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# Subtracting Across Zeros - PowerPoint PPT Presentation

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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Presentation Transcript

### Subtracting Across Zeros

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?

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.

First you borrow from the seven and make it a six. Then you can go back to the zero and make it a ten.

10

6

704

- 438

We no longer have a zero, but we still are not able to subtract eight from four.

10

6

704

- 438

9

10

14

6

704

- 438

2

6

6

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.

First you borrow from the three and make it a two. Then you can go back to the zero and make it a ten.

10

2

300

- 266

We no longer have a zero, but we still are not able to subtract six from zero.

10

2

300

- 266

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