2. IT’S TIME FOR… SUBTRACTION PRACTICE ! JACOB M. LIGHTBODY © 2016 LESSON #2: INTERMEDIATE LEVEL EXERCISES

3. D IRECTIONS: T RY TO SOLVE THE FOLLOWING PROBLEMS USING MENTAL MATH. C LICK ON YOUR ANSWER CHOICES ONCE YOU’VE MADE UP YOUR MIND.

4. _____ _____ 1.) U SE MENTAL MATH TO FIND THE ANSWER. 35 35 17 17 A.) 16 - B.) 17 C.) 18 D.) 19

5. G O B ACK! G O F ORWARD!

6. G O F ORWARD!

7. _____ _____ 2.) U SE MENTAL MATH TO FIND THE ANSWER. 41 41 26 26 A.) 15 - B.) 16 C.) 17 D.) 18

8. G O B ACK! G O F ORWARD!

9. G O F ORWARD!

10. _____ _____ 3.) U SE MENTAL MATH TO FIND THE ANSWER. 28 28 16 16 A.) 9 - B.) 12 C.) 15 D.) 17

11. G O B ACK! G O F ORWARD!

12. G O F ORWARD!

13. _____ _____ 4.) U SE MENTAL MATH TO FIND THE ANSWER. 51 51 22 22 A.) 31 - B.) 29 C.) 32 D.) 28

14. G O B ACK! G O F ORWARD!

15. G O F ORWARD!

16. _____ _____ 5.) U SE MENTAL MATH TO FIND THE ANSWER. 55 55 17 17 A.) 42 - B.) 38 C.) 37 D.) 35

17. G O B ACK! G O F ORWARD!

18. G O F ORWARD!

19. _____ _____ 6.) U SE MENTAL MATH TO FIND THE ANSWER. 43 43 25 25 A.) 26 - B.) 25 C.) 21 D.) 18

20. G O B ACK! G O F ORWARD!

21. G O F ORWARD!

22. _____ _____ 7.) U SE MENTAL MATH TO FIND THE ANSWER. 55 55 38 38 A.) 19 - B.) 17 C.) 15 D.) 14

23. G O B ACK! G O F ORWARD!

24. G O F ORWARD!

25. _____ _____ 8.) U SE MENTAL MATH TO FIND THE ANSWER. 37 37 23 23 A.) 23 - B.) 9 C.) 14 D.) 18

26. G O B ACK! G O F ORWARD!

27. G O F ORWARD!

28. _____ _____ 9.) U SE MENTAL MATH TO FIND THE ANSWER. 82 82 24 24 A.) 58 - B.) 62 C.) 49 D.) 54

29. G O B ACK! G O F ORWARD!

30. G O F ORWARD!

31. _____ _____ 10.) U SE MENTAL MATH TO FIND THE ANSWER. 75 75 68 68 A.) 9 - B.) 13 C.) 11 D.) 7

32. G O B ACK! G O F ORWARD!

33. G O F ORWARD!