Subtracting across zeros
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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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Eight cannot be subtracted from four so we have to go to the next door neighbor to borrow
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 zero1
How can I borrow when the neighbor is a zero? next door neighbor to borrow.

704

- 438


How can i borrow when the neighbor is a zero2
How can I borrow when the neighbor is a zero? next door neighbor to borrow.

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 zero3
How can I borrow when the neighbor is a zero? next door neighbor to borrow.

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

10

6

704

- 438



First we borrow from the ten and make it a nine
First we borrow from the ten and make it a nine. neighbor the ten.

9

10

6

704

- 438


Then we change the four to a fourteen
Then we change the four to a fourteen. neighbor the ten.

9

10

14

6

704

- 438


We are now ready to subtract
We are now ready to subtract! neighbor the ten.

9

10

14

6

704

- 438


9 neighbor the ten.

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

10

2

300

- 266



First we borrow from the ten and make it a nine1
First we borrow from the ten and make it a nine. neighbor the ten.

9

10

2

300

- 266


Then we change the zero to a ten
Then we change the zero to a ten. neighbor the ten.

9

10

10

2

300

- 266


We are now ready to subtract1
We are now ready to subtract! neighbor the ten.

9

10

10

2

300

- 266


We are now ready to subtract2
We are now ready to subtract! neighbor the ten.

9

10

10

2

300

- 266

3

4


Now it is your turn to try one! neighbor the ten.

9

10

10

6

700

- 211

4

8

9


Try another one! neighbor the ten.

9

10

10

7

800

- 92

7

0

8


Try one more! neighbor the ten.

9

9

10

4

10

10

5,000

- 174

4,

8

2

6



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