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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 374 · 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. 1.28 + 66 =
  2. 2.50 + 49 =
  3. 3.86 + 26 =
  4. 4.26 + 41 =
  5. 5.42 + 23 =
  6. 6.85 + 67 =
  7. 7.21 + 35 =
  8. 8.30 + 23 =
  9. 9.50 + 22 =
  10. 10.74 + 77 =
  11. 11.43 + 29 =
  12. 12.41 + 43 =
  13. 13.53 + 61 =
  14. 14.67 + 83 =
  15. 15.39 + 39 =
  16. 16.58 + 21 =
  17. 17.55 + 22 =
  18. 18.81 + 53 =
  19. 19.50 + 83 =
  20. 20.54 + 32 =
  21. 21.46 + 21 =
  22. 22.54 + 79 =
  23. 23.34 + 81 =
  24. 24.56 + 15 =
  25. 25.23 + 18 =
  26. 26.32 + 87 =
  27. 27.28 + 55 =
  28. 28.53 + 17 =
  29. 29.22 + 17 =
  30. 30.21 + 36 =
  31. 31.60 + 28 =
  32. 32.78 + 33 =
  33. 33.33 + 71 =
  34. 34.22 + 57 =
  35. 35.62 + 69 =
  36. 36.28 + 17 =
  37. 37.74 + 32 =
  38. 38.50 + 57 =
  39. 39.81 + 44 =
  40. 40.25 + 71 =

Answer key

  1. 94
  2. 99
  3. 112
  4. 67
  5. 65
  6. 152
  7. 56
  8. 53
  9. 72
  10. 151
  11. 72
  12. 84
  13. 114
  14. 150
  15. 78
  16. 79
  17. 77
  18. 134
  19. 133
  20. 86
  21. 67
  22. 133
  23. 115
  24. 71
  25. 41
  26. 119
  27. 83
  28. 70
  29. 39
  30. 57
  31. 88
  32. 111
  33. 104
  34. 79
  35. 131
  36. 45
  37. 106
  38. 107
  39. 125
  40. 96

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