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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 463 · 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. 1.38 + 51 =
  2. 2.76 + 29 =
  3. 3.70 + 86 =
  4. 4.32 + 21 =
  5. 5.36 + 32 =
  6. 6.74 + 19 =
  7. 7.89 + 41 =
  8. 8.41 + 76 =
  9. 9.57 + 47 =
  10. 10.80 + 66 =
  11. 11.23 + 74 =
  12. 12.80 + 18 =
  13. 13.75 + 59 =
  14. 14.25 + 23 =
  15. 15.46 + 62 =
  16. 16.80 + 57 =
  17. 17.80 + 31 =
  18. 18.83 + 46 =
  19. 19.54 + 32 =
  20. 20.23 + 55 =
  21. 21.72 + 25 =
  22. 22.82 + 54 =
  23. 23.27 + 48 =
  24. 24.79 + 35 =
  25. 25.66 + 47 =
  26. 26.25 + 31 =
  27. 27.23 + 65 =
  28. 28.21 + 72 =
  29. 29.24 + 21 =
  30. 30.22 + 67 =
  31. 31.50 + 15 =
  32. 32.44 + 12 =
  33. 33.85 + 17 =
  34. 34.34 + 19 =
  35. 35.68 + 83 =
  36. 36.61 + 35 =
  37. 37.43 + 64 =
  38. 38.82 + 53 =
  39. 39.41 + 71 =
  40. 40.71 + 22 =

Answer key

  1. 89
  2. 105
  3. 156
  4. 53
  5. 68
  6. 93
  7. 130
  8. 117
  9. 104
  10. 146
  11. 97
  12. 98
  13. 134
  14. 48
  15. 108
  16. 137
  17. 111
  18. 129
  19. 86
  20. 78
  21. 97
  22. 136
  23. 75
  24. 114
  25. 113
  26. 56
  27. 88
  28. 93
  29. 45
  30. 89
  31. 65
  32. 56
  33. 102
  34. 53
  35. 151
  36. 96
  37. 107
  38. 135
  39. 112
  40. 93

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