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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 154 · 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. 1.87 + 46 =
  2. 2.67 + 28 =
  3. 3.71 + 36 =
  4. 4.48 + 41 =
  5. 5.61 + 61 =
  6. 6.55 + 37 =
  7. 7.39 + 65 =
  8. 8.77 + 31 =
  9. 9.70 + 14 =
  10. 10.81 + 82 =
  11. 11.81 + 15 =
  12. 12.70 + 88 =
  13. 13.35 + 53 =
  14. 14.38 + 51 =
  15. 15.76 + 71 =
  16. 16.86 + 82 =
  17. 17.36 + 41 =
  18. 18.26 + 45 =
  19. 19.53 + 84 =
  20. 20.86 + 26 =
  21. 21.28 + 37 =
  22. 22.50 + 26 =
  23. 23.57 + 26 =
  24. 24.84 + 21 =
  25. 25.43 + 58 =
  26. 26.24 + 42 =
  27. 27.33 + 19 =
  28. 28.56 + 73 =
  29. 29.40 + 55 =
  30. 30.33 + 14 =
  31. 31.63 + 31 =
  32. 32.27 + 83 =
  33. 33.32 + 19 =
  34. 34.38 + 35 =
  35. 35.61 + 86 =
  36. 36.21 + 89 =
  37. 37.80 + 12 =
  38. 38.31 + 74 =
  39. 39.77 + 53 =
  40. 40.47 + 21 =

Answer key

  1. 133
  2. 95
  3. 107
  4. 89
  5. 122
  6. 92
  7. 104
  8. 108
  9. 84
  10. 163
  11. 96
  12. 158
  13. 88
  14. 89
  15. 147
  16. 168
  17. 77
  18. 71
  19. 137
  20. 112
  21. 65
  22. 76
  23. 83
  24. 105
  25. 101
  26. 66
  27. 52
  28. 129
  29. 95
  30. 47
  31. 94
  32. 110
  33. 51
  34. 73
  35. 147
  36. 110
  37. 92
  38. 105
  39. 130
  40. 68

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