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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 64 · 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. 1.81 + 45 =
  2. 2.59 + 16 =
  3. 3.38 + 21 =
  4. 4.56 + 62 =
  5. 5.53 + 51 =
  6. 6.81 + 29 =
  7. 7.62 + 61 =
  8. 8.89 + 86 =
  9. 9.69 + 56 =
  10. 10.73 + 78 =
  11. 11.34 + 21 =
  12. 12.86 + 43 =
  13. 13.58 + 22 =
  14. 14.37 + 85 =
  15. 15.22 + 85 =
  16. 16.54 + 75 =
  17. 17.35 + 71 =
  18. 18.21 + 53 =
  19. 19.54 + 28 =
  20. 20.25 + 71 =
  21. 21.42 + 32 =
  22. 22.79 + 87 =
  23. 23.51 + 21 =
  24. 24.49 + 27 =
  25. 25.68 + 84 =
  26. 26.38 + 37 =
  27. 27.50 + 73 =
  28. 28.33 + 81 =
  29. 29.47 + 12 =
  30. 30.82 + 54 =
  31. 31.34 + 47 =
  32. 32.73 + 12 =
  33. 33.39 + 33 =
  34. 34.40 + 65 =
  35. 35.26 + 16 =
  36. 36.58 + 23 =
  37. 37.51 + 18 =
  38. 38.81 + 68 =
  39. 39.35 + 41 =
  40. 40.44 + 13 =

Answer key

  1. 126
  2. 75
  3. 59
  4. 118
  5. 104
  6. 110
  7. 123
  8. 175
  9. 125
  10. 151
  11. 55
  12. 129
  13. 80
  14. 122
  15. 107
  16. 129
  17. 106
  18. 74
  19. 82
  20. 96
  21. 74
  22. 166
  23. 72
  24. 76
  25. 152
  26. 75
  27. 123
  28. 114
  29. 59
  30. 136
  31. 81
  32. 85
  33. 72
  34. 105
  35. 42
  36. 81
  37. 69
  38. 149
  39. 76
  40. 57

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