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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 175 · 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. 1.75 + 19 =
  2. 2.85 + 24 =
  3. 3.34 + 53 =
  4. 4.58 + 87 =
  5. 5.33 + 61 =
  6. 6.21 + 89 =
  7. 7.78 + 61 =
  8. 8.32 + 69 =
  9. 9.28 + 27 =
  10. 10.34 + 84 =
  11. 11.46 + 67 =
  12. 12.40 + 85 =
  13. 13.40 + 61 =
  14. 14.24 + 31 =
  15. 15.45 + 21 =
  16. 16.34 + 12 =
  17. 17.86 + 47 =
  18. 18.77 + 69 =
  19. 19.28 + 12 =
  20. 20.83 + 48 =
  21. 21.68 + 38 =
  22. 22.21 + 14 =
  23. 23.87 + 18 =
  24. 24.39 + 16 =
  25. 25.67 + 38 =
  26. 26.75 + 64 =
  27. 27.35 + 89 =
  28. 28.49 + 34 =
  29. 29.48 + 81 =
  30. 30.52 + 39 =
  31. 31.48 + 55 =
  32. 32.55 + 51 =
  33. 33.52 + 78 =
  34. 34.51 + 38 =
  35. 35.79 + 25 =
  36. 36.27 + 51 =
  37. 37.59 + 14 =
  38. 38.44 + 17 =
  39. 39.41 + 31 =
  40. 40.80 + 29 =

Answer key

  1. 94
  2. 109
  3. 87
  4. 145
  5. 94
  6. 110
  7. 139
  8. 101
  9. 55
  10. 118
  11. 113
  12. 125
  13. 101
  14. 55
  15. 66
  16. 46
  17. 133
  18. 146
  19. 40
  20. 131
  21. 106
  22. 35
  23. 105
  24. 55
  25. 105
  26. 139
  27. 124
  28. 83
  29. 129
  30. 91
  31. 103
  32. 106
  33. 130
  34. 89
  35. 104
  36. 78
  37. 73
  38. 61
  39. 72
  40. 109

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