1. Subtraction Towers
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2. Digit Cards Game

3. In order 5 7 9 Have you found any rules?
1、How many 3 digit numbers
can you create?
Have you found any rules?
2、Create the largest 3 digit number
The largest number must be in hundred place, the smallest number must be in unit place.
3、Create the smallest 3 digit number
The smallest number must be in hundred place, the largest number must be in unit place.

4. 1、Pick three numbers from the six nembers2 3 5 7 9
1、Pick three numbers from the six nembers
to create a 3 digit number
2、Create the largest 3 digit number
and the smallest 3 digit number
3、Find the difference

5. Create the largest 3 digit number
Start
Pick 3 digit cards
Create the largest 3 digit number
Create the smallest 3 digit number No
Find the difference
Are the 3 digits in your difference the same
as the 3 digits in this number sentence?
Yes
End

6. 975
－579
396
5, 7, 9
step1:
step2:
step3:
975－579
963
－369
594
963－369
954－459
975
－579
396
963
－369
594
954
－459
495
954
－459
495

7. Create the largest 3 digit number
Start
Pick 3 digit cards
Create the largest 3 digit number
Create the smallest 3 digit number
Find the difference
Are the 3 digits in your difference the same as the 3 digits in this number sentence?
Yes
End No

8. B A

9. Have you found any rules?

10. Company Logo

11. 495 Magic number Number of black holes Company Logo

12. 1、Pick three numbers to create a
summary：
1、Pick three numbers to create a
3 digit number
2、Create the largest 3 digit number
and the smallest 3 digit number
3、make Subtraction Towers

13. Thank You !
Thank You !
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