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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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?


How can I borrow when the neighbor is a 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.


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


We can go back now to the tens place and borrow from our neighbor the ten.

10

6

704

- 438


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

9

10

6

704

- 438


Then we change the four to a fourteen.

9

10

14

6

704

- 438


We are now ready to subtract!

9

10

14

6

704

- 438


9

10

14

6

704

- 438

2

6

6


How can I borrow when the neighbor is a zero?

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.


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


We can go back now to the tens place and borrow from our neighbor the ten.

10

2

300

- 266


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

9

10

2

300

- 266


Then we change the zero to a ten.

9

10

10

2

300

- 266


We are now ready to subtract!

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


Now you are ready to try some on your own good luck!


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