1. Subtraction 3rd – 5th grade
Adjusting One Number to Create an Easier Problem

2. Focus is on adjusting the whole (minuend)
Category 1
Focus is on adjusting the whole (minuend)

3. 9 – 4 10 – 4 19 – 4 20 – 14
May require more than one slide

4. 15 – 5 14 – 5 10 – 5 11 – 5
May require more than one slide

5. 20 – – – – 15
May require more than one slide

6. 31 – – – – 15
May require more than one slide

7. 51 – – – – 25
May require more than one slide

8. 50 – – – – 28
May require more than one slide

9. 30 – – – – 19
May require more than one slide

10. 37 – – – – 25
May require more than one slide

11. 99 – – – – 82
May require more than one slide

12. Adjusting the subtrahend (part being removed)
Category 2
Adjusting the subtrahend (part being removed)

13. 20 – – 9 20 – – 9
May require more than one slide

14. 25 – – – – 19
May require more than one slide

15. 40 – – – – 18
May require more than one slide

16. 30 – – – – 19
May require more than one slide

17. 50 – – – – 19
May require more than one slide

18. 60 – – – – 39
May require more than one slide

19. 70 – – – – 49
May require more than one slide

20. 80 – – – – 49
May require more than one slide

21. 100 – – – – 52
May require more than one slide

22. Category 3

23. 49 – – – – 28
May require more than one slide

24. 39 – – – – 18
May require more than one slide

25. 59 – – – – 45
May require more than one slide

26. 52 – – – – 37
May require more than one slide

27. 75 – – – – 39
May require more than one slide

28. 99 – – – – 68
May require more than one slide

29. 149 – – – – 128
May require more than one slide

30. 172 – – – – 88
May require more than one slide

31. 199 – – – – 99
May require more than one slide