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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 30 · 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. 1.32 + 19 =
  2. 2.67 + 46 =
  3. 3.55 + 12 =
  4. 4.68 + 38 =
  5. 5.88 + 63 =
  6. 6.23 + 23 =
  7. 7.37 + 85 =
  8. 8.77 + 62 =
  9. 9.49 + 82 =
  10. 10.23 + 32 =
  11. 11.46 + 27 =
  12. 12.80 + 47 =
  13. 13.24 + 61 =
  14. 14.54 + 59 =
  15. 15.82 + 45 =
  16. 16.85 + 52 =
  17. 17.33 + 64 =
  18. 18.32 + 34 =
  19. 19.72 + 31 =
  20. 20.50 + 72 =
  21. 21.52 + 73 =
  22. 22.70 + 67 =
  23. 23.39 + 29 =
  24. 24.87 + 58 =
  25. 25.21 + 27 =
  26. 26.63 + 23 =
  27. 27.63 + 39 =
  28. 28.53 + 52 =
  29. 29.58 + 23 =
  30. 30.63 + 12 =
  31. 31.62 + 67 =
  32. 32.62 + 87 =
  33. 33.54 + 27 =
  34. 34.54 + 51 =
  35. 35.54 + 81 =
  36. 36.39 + 45 =
  37. 37.56 + 85 =
  38. 38.57 + 44 =
  39. 39.65 + 59 =
  40. 40.88 + 44 =

Answer key

  1. 51
  2. 113
  3. 67
  4. 106
  5. 151
  6. 46
  7. 122
  8. 139
  9. 131
  10. 55
  11. 73
  12. 127
  13. 85
  14. 113
  15. 127
  16. 137
  17. 97
  18. 66
  19. 103
  20. 122
  21. 125
  22. 137
  23. 68
  24. 145
  25. 48
  26. 86
  27. 102
  28. 105
  29. 81
  30. 75
  31. 129
  32. 149
  33. 81
  34. 105
  35. 135
  36. 84
  37. 141
  38. 101
  39. 124
  40. 132

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