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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 685 · 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. 1.34 + 49 =
  2. 2.38 + 16 =
  3. 3.84 + 75 =
  4. 4.40 + 37 =
  5. 5.59 + 61 =
  6. 6.83 + 79 =
  7. 7.54 + 82 =
  8. 8.85 + 33 =
  9. 9.86 + 65 =
  10. 10.74 + 73 =
  11. 11.30 + 41 =
  12. 12.66 + 56 =
  13. 13.41 + 79 =
  14. 14.66 + 38 =
  15. 15.70 + 62 =
  16. 16.27 + 31 =
  17. 17.71 + 71 =
  18. 18.63 + 56 =
  19. 19.64 + 14 =
  20. 20.35 + 54 =
  21. 21.69 + 24 =
  22. 22.78 + 61 =
  23. 23.47 + 23 =
  24. 24.45 + 49 =
  25. 25.32 + 78 =
  26. 26.38 + 86 =
  27. 27.38 + 26 =
  28. 28.62 + 74 =
  29. 29.71 + 41 =
  30. 30.45 + 63 =
  31. 31.34 + 31 =
  32. 32.41 + 19 =
  33. 33.52 + 57 =
  34. 34.41 + 87 =
  35. 35.33 + 24 =
  36. 36.68 + 37 =
  37. 37.61 + 19 =
  38. 38.46 + 17 =
  39. 39.82 + 12 =
  40. 40.62 + 51 =

Answer key

  1. 83
  2. 54
  3. 159
  4. 77
  5. 120
  6. 162
  7. 136
  8. 118
  9. 151
  10. 147
  11. 71
  12. 122
  13. 120
  14. 104
  15. 132
  16. 58
  17. 142
  18. 119
  19. 78
  20. 89
  21. 93
  22. 139
  23. 70
  24. 94
  25. 110
  26. 124
  27. 64
  28. 136
  29. 112
  30. 108
  31. 65
  32. 60
  33. 109
  34. 128
  35. 57
  36. 105
  37. 80
  38. 63
  39. 94
  40. 113

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