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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 404 · 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. 1.77 + 33 =
  2. 2.74 + 38 =
  3. 3.69 + 58 =
  4. 4.75 + 57 =
  5. 5.84 + 58 =
  6. 6.71 + 47 =
  7. 7.84 + 79 =
  8. 8.38 + 19 =
  9. 9.87 + 44 =
  10. 10.71 + 19 =
  11. 11.36 + 34 =
  12. 12.53 + 61 =
  13. 13.22 + 54 =
  14. 14.65 + 26 =
  15. 15.21 + 82 =
  16. 16.68 + 41 =
  17. 17.68 + 86 =
  18. 18.34 + 27 =
  19. 19.43 + 31 =
  20. 20.31 + 38 =
  21. 21.40 + 28 =
  22. 22.28 + 38 =
  23. 23.73 + 22 =
  24. 24.51 + 83 =
  25. 25.52 + 66 =
  26. 26.33 + 72 =
  27. 27.22 + 31 =
  28. 28.67 + 13 =
  29. 29.22 + 67 =
  30. 30.52 + 61 =
  31. 31.65 + 55 =
  32. 32.80 + 87 =
  33. 33.87 + 57 =
  34. 34.42 + 71 =
  35. 35.44 + 19 =
  36. 36.66 + 61 =
  37. 37.79 + 17 =
  38. 38.57 + 41 =
  39. 39.66 + 31 =
  40. 40.87 + 61 =

Answer key

  1. 110
  2. 112
  3. 127
  4. 132
  5. 142
  6. 118
  7. 163
  8. 57
  9. 131
  10. 90
  11. 70
  12. 114
  13. 76
  14. 91
  15. 103
  16. 109
  17. 154
  18. 61
  19. 74
  20. 69
  21. 68
  22. 66
  23. 95
  24. 134
  25. 118
  26. 105
  27. 53
  28. 80
  29. 89
  30. 113
  31. 120
  32. 167
  33. 144
  34. 113
  35. 63
  36. 127
  37. 96
  38. 98
  39. 97
  40. 148

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