2. 1. Take out a blank piece of paper. 2. Label your paper 1-30 down the left-hand side. 3. You have 18s to complete each question. 4. At the end of this exercise, you will be given the answers to the questions. Give yourself a mark out of 30.

3. Mental Math Begins in 10 seconds

4. Question 1. 12 + 19

5. Question 2. 31 + 45

6. Question 3. 16 + 20

7. Question 4. 18 + 23

8. Question 5. 37 - 14

9. Question 6. 21 - 26

10. Question 7. 28 - 19

11. Question 8. 74 + 27

12. Question 9. 86 - 35

13. Question 10. 55 + 38

14. Question 11. 86 - 46

15. Question 12. 47 + 58

16. Question 13. 95 - 47

17. Question 14. 73 - 28

18. Question 15. 42 + 27

19. Question 16. 28 - 17

20. Question 17. 18 + 77

21. Question 18. 65 - 33

22. Question 19. 58 + 37

23. Question 20. 61 - 47

24. Question 21. 79 + 12

25. Question 22. 58 - 16

26. Question 23. 24 - 15

27. Question 24. 35 + 48

28. Question 25. 66 – 22

29. Question 26. 33 + 57

30. Question 27. 48 - 27

31. Question 28. 86 - 24

32. Question 29. 27 + 45

33. Question 30. 36 + 15

34. Answers

35. Question 1. 12 + 19 = 31

36. Question 2. 31 + 45 = 76

37. Question 3. 16 + 20 = 36

38. Question 4. 18 + 23 = 41

39. Question 5. 37 - 14 = 23

40. Question 6. 21 - 26 = -5

41. Question 7. 28 - 19 = 9

42. Question 8. 74 + 27 = 101

43. Question 9. 86 - 35 = 51

44. Question 10. 55 + 38 = 93

45. Question 11. 86 - 46 = 40

46. Question 12. 47 + 58 = 105

47. Question 13. 95 - 47 = 48

48. Question 14. 73 - 28 = 45

49. Question 15. 42 + 27 = 69

50. Question 16. 28 - 17 = 11

51. Question 17. 18 + 77 = 95

52. Question 18. 65 - 33 = 32

53. Question 19. 58 + 37 = 95

54. Question 20. 61 - 47 = 14

55. Question 21. 79 + 12 = 91

56. Question 22. 58 - 16 = 42

57. Question 23. 24 - 15 = 9

58. Question 24. 35 + 48 = 83

59. Question 25. 66 – 22 = 44

60. Question 26. 33 + 57 = 90

61. Question 27. 48 - 27 = 21

62. Question 28. 86 - 24 = 62

63. Question 29. 27 + 45 = 72

64. Question 30. 36 + 15 = 51