1. Subtraction Shortcuts and Tips
By Monica Yuskaitis

2. Subtracting Across Zeros
3 0 2
1 9 8

3. Step 1 – Borrow 1 from the 30
3 0 2
1 9 8

4. Step 2 – Cross out the 30
3 0 2
1 9 8

5. Step 3 – Write a 29 above the 30
2 9
3 0 2
1 9 8

6. Step 4 – Write a 1 in front of the 2
2 9
3 0 2
1 9 8 1

7. Step 5 – Subtract 8 from 12
2 9
3 0 2
1 9 8 1 4

8. Step 6 – Subtract 9 from 9
2 9
3 0 2
1 9 8 1 4

9. Step 7 – Subtract 1 from 2
2 9
3 0 2
1 9 8 1 1 4

10. We’re Finished
2 9
3 0 2
1 9 8 1 1 4

11. Second Example

12. Step 1 – Borrow 1 from 800

13. Step 2 – Cross out the 800

14. Step 3 – Write 799 above the 800

15. Step 4 – Write a 1 next to the 2 1

16. Step 5 – Subtract 5 from the 12 1 7

17. Step 6 – Subtract 6 from the 9 1 3 7

18. Step 7 – Subtract 6 from the 9 1 2 3 7

19. Step 7 – Subtract 3 from the 7 1 4 2 3 7

20. We’re Finished 1 4 2 3 7

21. It’s Your Turn 1 4 1 6 9

22. It’s Your Turn Again 1 1 4 8

23. Subtraction Tips

24. Never subtract the top number from the bottom number
6 1 3
2 7 9
4 6 6
Your answer will always be wrong.

25. Never borrow unless you need to5
9 6 2
8 4 1 1
Your answer will always be wrong.

26. Practice your subtraction facts9 13
18 – 9 =
18 – 7 =
16 – 8 =
14 – 8 =
12 – 9 =
11 – 3 =
15 – 7 =
9 – 3 =
18 – 5 =
18 – 3 =
16 – 7 =
14 – 6 =
12 – 4 =
11 – 7 =
15 – 6 =
9 – 5 = 11 15 8 9 6 8 3 8 8 4 8 9 6 4