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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 363 · 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. 1.82 + 41 =
  2. 2.76 + 48 =
  3. 3.47 + 71 =
  4. 4.46 + 26 =
  5. 5.87 + 57 =
  6. 6.39 + 15 =
  7. 7.27 + 41 =
  8. 8.77 + 15 =
  9. 9.32 + 23 =
  10. 10.57 + 51 =
  11. 11.46 + 42 =
  12. 12.60 + 61 =
  13. 13.36 + 83 =
  14. 14.71 + 14 =
  15. 15.78 + 79 =
  16. 16.32 + 53 =
  17. 17.27 + 47 =
  18. 18.49 + 17 =
  19. 19.47 + 58 =
  20. 20.35 + 87 =
  21. 21.75 + 45 =
  22. 22.66 + 28 =
  23. 23.85 + 62 =
  24. 24.24 + 88 =
  25. 25.62 + 26 =
  26. 26.45 + 38 =
  27. 27.74 + 79 =
  28. 28.38 + 14 =
  29. 29.28 + 38 =
  30. 30.30 + 42 =
  31. 31.56 + 22 =
  32. 32.89 + 34 =
  33. 33.48 + 76 =
  34. 34.57 + 57 =
  35. 35.82 + 82 =
  36. 36.81 + 17 =
  37. 37.70 + 62 =
  38. 38.79 + 39 =
  39. 39.71 + 12 =
  40. 40.29 + 25 =

Answer key

  1. 123
  2. 124
  3. 118
  4. 72
  5. 144
  6. 54
  7. 68
  8. 92
  9. 55
  10. 108
  11. 88
  12. 121
  13. 119
  14. 85
  15. 157
  16. 85
  17. 74
  18. 66
  19. 105
  20. 122
  21. 120
  22. 94
  23. 147
  24. 112
  25. 88
  26. 83
  27. 153
  28. 52
  29. 66
  30. 72
  31. 78
  32. 123
  33. 124
  34. 114
  35. 164
  36. 98
  37. 132
  38. 118
  39. 83
  40. 54

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