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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 637 · 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. 1.40 + 53 =
  2. 2.33 + 21 =
  3. 3.81 + 56 =
  4. 4.89 + 35 =
  5. 5.54 + 69 =
  6. 6.87 + 52 =
  7. 7.60 + 24 =
  8. 8.58 + 31 =
  9. 9.45 + 41 =
  10. 10.60 + 34 =
  11. 11.37 + 14 =
  12. 12.71 + 19 =
  13. 13.52 + 22 =
  14. 14.32 + 47 =
  15. 15.31 + 33 =
  16. 16.89 + 69 =
  17. 17.56 + 19 =
  18. 18.36 + 76 =
  19. 19.38 + 61 =
  20. 20.67 + 42 =
  21. 21.22 + 15 =
  22. 22.26 + 69 =
  23. 23.68 + 16 =
  24. 24.28 + 49 =
  25. 25.49 + 69 =
  26. 26.53 + 87 =
  27. 27.48 + 44 =
  28. 28.29 + 46 =
  29. 29.82 + 61 =
  30. 30.58 + 21 =
  31. 31.61 + 15 =
  32. 32.77 + 41 =
  33. 33.85 + 61 =
  34. 34.27 + 42 =
  35. 35.26 + 35 =
  36. 36.35 + 47 =
  37. 37.52 + 31 =
  38. 38.30 + 16 =
  39. 39.75 + 21 =
  40. 40.28 + 27 =

Answer key

  1. 93
  2. 54
  3. 137
  4. 124
  5. 123
  6. 139
  7. 84
  8. 89
  9. 86
  10. 94
  11. 51
  12. 90
  13. 74
  14. 79
  15. 64
  16. 158
  17. 75
  18. 112
  19. 99
  20. 109
  21. 37
  22. 95
  23. 84
  24. 77
  25. 118
  26. 140
  27. 92
  28. 75
  29. 143
  30. 79
  31. 76
  32. 118
  33. 146
  34. 69
  35. 61
  36. 82
  37. 83
  38. 46
  39. 96
  40. 55

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