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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 349 · 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. 1.24 + 21 =
  2. 2.39 + 32 =
  3. 3.49 + 52 =
  4. 4.81 + 38 =
  5. 5.83 + 82 =
  6. 6.42 + 26 =
  7. 7.56 + 75 =
  8. 8.42 + 58 =
  9. 9.74 + 17 =
  10. 10.50 + 32 =
  11. 11.25 + 84 =
  12. 12.60 + 69 =
  13. 13.66 + 27 =
  14. 14.80 + 46 =
  15. 15.24 + 15 =
  16. 16.48 + 14 =
  17. 17.43 + 81 =
  18. 18.65 + 31 =
  19. 19.76 + 38 =
  20. 20.83 + 89 =
  21. 21.23 + 41 =
  22. 22.42 + 25 =
  23. 23.87 + 17 =
  24. 24.84 + 65 =
  25. 25.37 + 17 =
  26. 26.30 + 41 =
  27. 27.24 + 89 =
  28. 28.27 + 67 =
  29. 29.71 + 71 =
  30. 30.76 + 89 =
  31. 31.84 + 21 =
  32. 32.61 + 29 =
  33. 33.59 + 33 =
  34. 34.80 + 87 =
  35. 35.35 + 85 =
  36. 36.63 + 82 =
  37. 37.56 + 31 =
  38. 38.21 + 29 =
  39. 39.54 + 31 =
  40. 40.72 + 56 =

Answer key

  1. 45
  2. 71
  3. 101
  4. 119
  5. 165
  6. 68
  7. 131
  8. 100
  9. 91
  10. 82
  11. 109
  12. 129
  13. 93
  14. 126
  15. 39
  16. 62
  17. 124
  18. 96
  19. 114
  20. 172
  21. 64
  22. 67
  23. 104
  24. 149
  25. 54
  26. 71
  27. 113
  28. 94
  29. 142
  30. 165
  31. 105
  32. 90
  33. 92
  34. 167
  35. 120
  36. 145
  37. 87
  38. 50
  39. 85
  40. 128

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