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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 540 · 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 + 59 =
  2. 2.53 + 21 =
  3. 3.37 + 21 =
  4. 4.65 + 83 =
  5. 5.80 + 61 =
  6. 6.36 + 21 =
  7. 7.42 + 76 =
  8. 8.89 + 89 =
  9. 9.41 + 84 =
  10. 10.49 + 81 =
  11. 11.39 + 56 =
  12. 12.41 + 89 =
  13. 13.64 + 17 =
  14. 14.24 + 39 =
  15. 15.61 + 43 =
  16. 16.52 + 39 =
  17. 17.81 + 77 =
  18. 18.86 + 64 =
  19. 19.54 + 87 =
  20. 20.25 + 39 =
  21. 21.82 + 65 =
  22. 22.47 + 31 =
  23. 23.25 + 76 =
  24. 24.37 + 51 =
  25. 25.67 + 39 =
  26. 26.53 + 43 =
  27. 27.27 + 23 =
  28. 28.63 + 31 =
  29. 29.74 + 39 =
  30. 30.56 + 16 =
  31. 31.24 + 17 =
  32. 32.31 + 85 =
  33. 33.74 + 47 =
  34. 34.36 + 39 =
  35. 35.23 + 51 =
  36. 36.23 + 63 =
  37. 37.55 + 51 =
  38. 38.27 + 17 =
  39. 39.40 + 52 =
  40. 40.73 + 22 =

Answer key

  1. 90
  2. 74
  3. 58
  4. 148
  5. 141
  6. 57
  7. 118
  8. 178
  9. 125
  10. 130
  11. 95
  12. 130
  13. 81
  14. 63
  15. 104
  16. 91
  17. 158
  18. 150
  19. 141
  20. 64
  21. 147
  22. 78
  23. 101
  24. 88
  25. 106
  26. 96
  27. 50
  28. 94
  29. 113
  30. 72
  31. 41
  32. 116
  33. 121
  34. 75
  35. 74
  36. 86
  37. 106
  38. 44
  39. 92
  40. 95

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