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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 708 · 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. 1.27 + 87 =
  2. 2.64 + 79 =
  3. 3.61 + 41 =
  4. 4.81 + 82 =
  5. 5.37 + 43 =
  6. 6.76 + 55 =
  7. 7.40 + 26 =
  8. 8.68 + 14 =
  9. 9.89 + 31 =
  10. 10.88 + 41 =
  11. 11.29 + 24 =
  12. 12.35 + 31 =
  13. 13.40 + 74 =
  14. 14.88 + 39 =
  15. 15.65 + 74 =
  16. 16.87 + 45 =
  17. 17.25 + 47 =
  18. 18.46 + 64 =
  19. 19.60 + 36 =
  20. 20.53 + 24 =
  21. 21.27 + 49 =
  22. 22.75 + 61 =
  23. 23.58 + 52 =
  24. 24.64 + 31 =
  25. 25.80 + 58 =
  26. 26.67 + 63 =
  27. 27.35 + 86 =
  28. 28.55 + 78 =
  29. 29.58 + 25 =
  30. 30.76 + 14 =
  31. 31.63 + 32 =
  32. 32.42 + 41 =
  33. 33.58 + 51 =
  34. 34.82 + 71 =
  35. 35.76 + 83 =
  36. 36.49 + 65 =
  37. 37.88 + 82 =
  38. 38.36 + 57 =
  39. 39.56 + 12 =
  40. 40.48 + 84 =

Answer key

  1. 114
  2. 143
  3. 102
  4. 163
  5. 80
  6. 131
  7. 66
  8. 82
  9. 120
  10. 129
  11. 53
  12. 66
  13. 114
  14. 127
  15. 139
  16. 132
  17. 72
  18. 110
  19. 96
  20. 77
  21. 76
  22. 136
  23. 110
  24. 95
  25. 138
  26. 130
  27. 121
  28. 133
  29. 83
  30. 90
  31. 95
  32. 83
  33. 109
  34. 153
  35. 159
  36. 114
  37. 170
  38. 93
  39. 68
  40. 132

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