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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 529 · 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. 1.75 + 67 =
  2. 2.42 + 89 =
  3. 3.35 + 51 =
  4. 4.89 + 55 =
  5. 5.30 + 55 =
  6. 6.36 + 68 =
  7. 7.28 + 19 =
  8. 8.61 + 22 =
  9. 9.32 + 76 =
  10. 10.30 + 69 =
  11. 11.21 + 67 =
  12. 12.57 + 13 =
  13. 13.73 + 66 =
  14. 14.79 + 26 =
  15. 15.70 + 16 =
  16. 16.79 + 63 =
  17. 17.55 + 56 =
  18. 18.52 + 21 =
  19. 19.45 + 77 =
  20. 20.38 + 58 =
  21. 21.65 + 42 =
  22. 22.40 + 72 =
  23. 23.27 + 53 =
  24. 24.73 + 89 =
  25. 25.29 + 42 =
  26. 26.70 + 71 =
  27. 27.22 + 85 =
  28. 28.28 + 15 =
  29. 29.72 + 76 =
  30. 30.58 + 68 =
  31. 31.42 + 51 =
  32. 32.82 + 21 =
  33. 33.45 + 39 =
  34. 34.60 + 76 =
  35. 35.30 + 15 =
  36. 36.28 + 21 =
  37. 37.82 + 35 =
  38. 38.84 + 34 =
  39. 39.69 + 79 =
  40. 40.73 + 71 =

Answer key

  1. 142
  2. 131
  3. 86
  4. 144
  5. 85
  6. 104
  7. 47
  8. 83
  9. 108
  10. 99
  11. 88
  12. 70
  13. 139
  14. 105
  15. 86
  16. 142
  17. 111
  18. 73
  19. 122
  20. 96
  21. 107
  22. 112
  23. 80
  24. 162
  25. 71
  26. 141
  27. 107
  28. 43
  29. 148
  30. 126
  31. 93
  32. 103
  33. 84
  34. 136
  35. 45
  36. 49
  37. 117
  38. 118
  39. 148
  40. 144

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