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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 345 · 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. 1.26 + 51 =
  2. 2.56 + 31 =
  3. 3.23 + 76 =
  4. 4.55 + 25 =
  5. 5.33 + 15 =
  6. 6.29 + 23 =
  7. 7.82 + 14 =
  8. 8.74 + 61 =
  9. 9.81 + 89 =
  10. 10.89 + 13 =
  11. 11.86 + 75 =
  12. 12.85 + 56 =
  13. 13.78 + 15 =
  14. 14.27 + 25 =
  15. 15.30 + 62 =
  16. 16.64 + 57 =
  17. 17.69 + 29 =
  18. 18.26 + 85 =
  19. 19.52 + 29 =
  20. 20.51 + 53 =
  21. 21.35 + 67 =
  22. 22.73 + 71 =
  23. 23.88 + 57 =
  24. 24.27 + 74 =
  25. 25.86 + 52 =
  26. 26.68 + 51 =
  27. 27.39 + 23 =
  28. 28.38 + 67 =
  29. 29.81 + 79 =
  30. 30.80 + 54 =
  31. 31.72 + 42 =
  32. 32.51 + 75 =
  33. 33.49 + 53 =
  34. 34.45 + 26 =
  35. 35.73 + 31 =
  36. 36.52 + 51 =
  37. 37.82 + 83 =
  38. 38.86 + 68 =
  39. 39.46 + 71 =
  40. 40.74 + 72 =

Answer key

  1. 77
  2. 87
  3. 99
  4. 80
  5. 48
  6. 52
  7. 96
  8. 135
  9. 170
  10. 102
  11. 161
  12. 141
  13. 93
  14. 52
  15. 92
  16. 121
  17. 98
  18. 111
  19. 81
  20. 104
  21. 102
  22. 144
  23. 145
  24. 101
  25. 138
  26. 119
  27. 62
  28. 105
  29. 160
  30. 134
  31. 114
  32. 126
  33. 102
  34. 71
  35. 104
  36. 103
  37. 165
  38. 154
  39. 117
  40. 146

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