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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 461 · 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. 1.50 + 88 =
  2. 2.44 + 25 =
  3. 3.37 + 19 =
  4. 4.28 + 87 =
  5. 5.72 + 56 =
  6. 6.85 + 36 =
  7. 7.87 + 53 =
  8. 8.42 + 21 =
  9. 9.85 + 48 =
  10. 10.21 + 26 =
  11. 11.29 + 19 =
  12. 12.31 + 26 =
  13. 13.59 + 31 =
  14. 14.50 + 68 =
  15. 15.29 + 36 =
  16. 16.70 + 61 =
  17. 17.48 + 34 =
  18. 18.46 + 35 =
  19. 19.29 + 64 =
  20. 20.28 + 55 =
  21. 21.72 + 26 =
  22. 22.43 + 13 =
  23. 23.85 + 84 =
  24. 24.47 + 29 =
  25. 25.89 + 71 =
  26. 26.23 + 75 =
  27. 27.52 + 44 =
  28. 28.38 + 46 =
  29. 29.24 + 69 =
  30. 30.77 + 65 =
  31. 31.30 + 78 =
  32. 32.81 + 43 =
  33. 33.61 + 68 =
  34. 34.62 + 33 =
  35. 35.77 + 21 =
  36. 36.74 + 41 =
  37. 37.25 + 58 =
  38. 38.84 + 38 =
  39. 39.43 + 19 =
  40. 40.78 + 71 =

Answer key

  1. 138
  2. 69
  3. 56
  4. 115
  5. 128
  6. 121
  7. 140
  8. 63
  9. 133
  10. 47
  11. 48
  12. 57
  13. 90
  14. 118
  15. 65
  16. 131
  17. 82
  18. 81
  19. 93
  20. 83
  21. 98
  22. 56
  23. 169
  24. 76
  25. 160
  26. 98
  27. 96
  28. 84
  29. 93
  30. 142
  31. 108
  32. 124
  33. 129
  34. 95
  35. 98
  36. 115
  37. 83
  38. 122
  39. 62
  40. 149

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