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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 1 · 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. 1.29 + 62 =
  2. 2.31 + 27 =
  3. 3.71 + 65 =
  4. 4.83 + 23 =
  5. 5.26 + 35 =
  6. 6.33 + 76 =
  7. 7.38 + 76 =
  8. 8.85 + 14 =
  9. 9.78 + 41 =
  10. 10.60 + 17 =
  11. 11.67 + 23 =
  12. 12.70 + 13 =
  13. 13.21 + 73 =
  14. 14.58 + 32 =
  15. 15.55 + 65 =
  16. 16.55 + 54 =
  17. 17.33 + 54 =
  18. 18.28 + 44 =
  19. 19.69 + 18 =
  20. 20.53 + 22 =
  21. 21.63 + 51 =
  22. 22.43 + 17 =
  23. 23.86 + 78 =
  24. 24.50 + 34 =
  25. 25.21 + 13 =
  26. 26.40 + 21 =
  27. 27.55 + 16 =
  28. 28.45 + 81 =
  29. 29.38 + 62 =
  30. 30.55 + 24 =
  31. 31.50 + 24 =
  32. 32.59 + 52 =
  33. 33.26 + 43 =
  34. 34.66 + 51 =
  35. 35.74 + 59 =
  36. 36.85 + 61 =
  37. 37.62 + 24 =
  38. 38.28 + 33 =
  39. 39.24 + 22 =
  40. 40.57 + 51 =

Answer key

  1. 91
  2. 58
  3. 136
  4. 106
  5. 61
  6. 109
  7. 114
  8. 99
  9. 119
  10. 77
  11. 90
  12. 83
  13. 94
  14. 90
  15. 120
  16. 109
  17. 87
  18. 72
  19. 87
  20. 75
  21. 114
  22. 60
  23. 164
  24. 84
  25. 34
  26. 61
  27. 71
  28. 126
  29. 100
  30. 79
  31. 74
  32. 111
  33. 69
  34. 117
  35. 133
  36. 146
  37. 86
  38. 61
  39. 46
  40. 108

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