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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 47 · 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. 1.31 + 28 =
  2. 2.82 + 21 =
  3. 3.51 + 16 =
  4. 4.28 + 43 =
  5. 5.61 + 22 =
  6. 6.59 + 34 =
  7. 7.85 + 75 =
  8. 8.61 + 73 =
  9. 9.38 + 84 =
  10. 10.56 + 88 =
  11. 11.53 + 46 =
  12. 12.83 + 21 =
  13. 13.33 + 33 =
  14. 14.55 + 64 =
  15. 15.29 + 39 =
  16. 16.52 + 38 =
  17. 17.29 + 44 =
  18. 18.49 + 27 =
  19. 19.70 + 56 =
  20. 20.63 + 85 =
  21. 21.56 + 53 =
  22. 22.26 + 41 =
  23. 23.58 + 55 =
  24. 24.70 + 44 =
  25. 25.49 + 64 =
  26. 26.40 + 89 =
  27. 27.88 + 14 =
  28. 28.48 + 18 =
  29. 29.87 + 66 =
  30. 30.49 + 15 =
  31. 31.35 + 48 =
  32. 32.56 + 37 =
  33. 33.41 + 61 =
  34. 34.37 + 31 =
  35. 35.31 + 68 =
  36. 36.75 + 22 =
  37. 37.79 + 78 =
  38. 38.39 + 34 =
  39. 39.68 + 56 =
  40. 40.30 + 81 =

Answer key

  1. 59
  2. 103
  3. 67
  4. 71
  5. 83
  6. 93
  7. 160
  8. 134
  9. 122
  10. 144
  11. 99
  12. 104
  13. 66
  14. 119
  15. 68
  16. 90
  17. 73
  18. 76
  19. 126
  20. 148
  21. 109
  22. 67
  23. 113
  24. 114
  25. 113
  26. 129
  27. 102
  28. 66
  29. 153
  30. 64
  31. 83
  32. 93
  33. 102
  34. 68
  35. 99
  36. 97
  37. 157
  38. 73
  39. 124
  40. 111

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