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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 617 · 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. 1.76 + 57 =
  2. 2.81 + 58 =
  3. 3.72 + 66 =
  4. 4.65 + 47 =
  5. 5.37 + 44 =
  6. 6.34 + 47 =
  7. 7.44 + 16 =
  8. 8.70 + 87 =
  9. 9.80 + 61 =
  10. 10.52 + 19 =
  11. 11.33 + 82 =
  12. 12.70 + 71 =
  13. 13.85 + 32 =
  14. 14.75 + 14 =
  15. 15.83 + 12 =
  16. 16.62 + 81 =
  17. 17.67 + 37 =
  18. 18.38 + 64 =
  19. 19.80 + 51 =
  20. 20.87 + 31 =
  21. 21.48 + 17 =
  22. 22.31 + 21 =
  23. 23.23 + 61 =
  24. 24.44 + 61 =
  25. 25.79 + 32 =
  26. 26.63 + 44 =
  27. 27.52 + 88 =
  28. 28.66 + 73 =
  29. 29.44 + 19 =
  30. 30.64 + 12 =
  31. 31.52 + 44 =
  32. 32.59 + 69 =
  33. 33.58 + 17 =
  34. 34.75 + 63 =
  35. 35.44 + 42 =
  36. 36.43 + 51 =
  37. 37.49 + 26 =
  38. 38.58 + 37 =
  39. 39.66 + 88 =
  40. 40.55 + 61 =

Answer key

  1. 133
  2. 139
  3. 138
  4. 112
  5. 81
  6. 81
  7. 60
  8. 157
  9. 141
  10. 71
  11. 115
  12. 141
  13. 117
  14. 89
  15. 95
  16. 143
  17. 104
  18. 102
  19. 131
  20. 118
  21. 65
  22. 52
  23. 84
  24. 105
  25. 111
  26. 107
  27. 140
  28. 139
  29. 63
  30. 76
  31. 96
  32. 128
  33. 75
  34. 138
  35. 86
  36. 94
  37. 75
  38. 95
  39. 154
  40. 116

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