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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 359 · 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. 1.29 + 19 =
  2. 2.53 + 31 =
  3. 3.67 + 46 =
  4. 4.31 + 84 =
  5. 5.89 + 57 =
  6. 6.49 + 15 =
  7. 7.67 + 88 =
  8. 8.49 + 63 =
  9. 9.72 + 77 =
  10. 10.37 + 43 =
  11. 11.86 + 25 =
  12. 12.83 + 61 =
  13. 13.68 + 18 =
  14. 14.40 + 74 =
  15. 15.85 + 71 =
  16. 16.36 + 85 =
  17. 17.32 + 85 =
  18. 18.31 + 58 =
  19. 19.37 + 14 =
  20. 20.82 + 68 =
  21. 21.81 + 58 =
  22. 22.27 + 15 =
  23. 23.25 + 26 =
  24. 24.88 + 89 =
  25. 25.60 + 66 =
  26. 26.72 + 88 =
  27. 27.57 + 71 =
  28. 28.78 + 31 =
  29. 29.88 + 35 =
  30. 30.48 + 45 =
  31. 31.39 + 21 =
  32. 32.31 + 49 =
  33. 33.31 + 21 =
  34. 34.76 + 65 =
  35. 35.34 + 21 =
  36. 36.89 + 73 =
  37. 37.75 + 15 =
  38. 38.61 + 25 =
  39. 39.39 + 48 =
  40. 40.70 + 77 =

Answer key

  1. 48
  2. 84
  3. 113
  4. 115
  5. 146
  6. 64
  7. 155
  8. 112
  9. 149
  10. 80
  11. 111
  12. 144
  13. 86
  14. 114
  15. 156
  16. 121
  17. 117
  18. 89
  19. 51
  20. 150
  21. 139
  22. 42
  23. 51
  24. 177
  25. 126
  26. 160
  27. 128
  28. 109
  29. 123
  30. 93
  31. 60
  32. 80
  33. 52
  34. 141
  35. 55
  36. 162
  37. 90
  38. 86
  39. 87
  40. 147

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