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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 729 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.69 + 46 =
  2. 2.33 + 72 =
  3. 3.65 + 77 =
  4. 4.66 + 69 =
  5. 5.49 + 29 =
  6. 6.57 + 27 =
  7. 7.34 + 61 =
  8. 8.41 + 88 =
  9. 9.79 + 79 =
  10. 10.51 + 85 =
  11. 11.82 + 12 =
  12. 12.24 + 74 =
  13. 13.28 + 43 =
  14. 14.60 + 66 =
  15. 15.61 + 83 =
  16. 16.71 + 38 =
  17. 17.83 + 85 =
  18. 18.40 + 31 =
  19. 19.24 + 76 =
  20. 20.87 + 33 =
  21. 21.85 + 18 =
  22. 22.24 + 69 =
  23. 23.25 + 42 =
  24. 24.21 + 38 =
  25. 25.72 + 19 =
  26. 26.25 + 77 =
  27. 27.22 + 48 =
  28. 28.63 + 27 =
  29. 29.37 + 39 =
  30. 30.38 + 47 =
  31. 31.60 + 56 =
  32. 32.22 + 47 =
  33. 33.55 + 53 =
  34. 34.63 + 28 =
  35. 35.81 + 46 =
  36. 36.41 + 65 =
  37. 37.24 + 29 =
  38. 38.82 + 84 =
  39. 39.33 + 22 =
  40. 40.79 + 23 =

Answer key

  1. 115
  2. 105
  3. 142
  4. 135
  5. 78
  6. 84
  7. 95
  8. 129
  9. 158
  10. 136
  11. 94
  12. 98
  13. 71
  14. 126
  15. 144
  16. 109
  17. 168
  18. 71
  19. 100
  20. 120
  21. 103
  22. 93
  23. 67
  24. 59
  25. 91
  26. 102
  27. 70
  28. 90
  29. 76
  30. 85
  31. 116
  32. 69
  33. 108
  34. 91
  35. 127
  36. 106
  37. 53
  38. 166
  39. 55
  40. 102

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