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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 819 · 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. 1.25 + 14 =
  2. 2.70 + 86 =
  3. 3.21 + 15 =
  4. 4.37 + 88 =
  5. 5.48 + 86 =
  6. 6.22 + 16 =
  7. 7.25 + 72 =
  8. 8.84 + 64 =
  9. 9.42 + 45 =
  10. 10.84 + 81 =
  11. 11.37 + 61 =
  12. 12.55 + 79 =
  13. 13.68 + 24 =
  14. 14.76 + 21 =
  15. 15.73 + 34 =
  16. 16.65 + 23 =
  17. 17.72 + 46 =
  18. 18.57 + 66 =
  19. 19.59 + 81 =
  20. 20.49 + 34 =
  21. 21.30 + 33 =
  22. 22.82 + 23 =
  23. 23.69 + 29 =
  24. 24.31 + 34 =
  25. 25.27 + 25 =
  26. 26.86 + 89 =
  27. 27.87 + 43 =
  28. 28.60 + 45 =
  29. 29.44 + 72 =
  30. 30.65 + 56 =
  31. 31.62 + 83 =
  32. 32.39 + 57 =
  33. 33.48 + 52 =
  34. 34.77 + 28 =
  35. 35.36 + 87 =
  36. 36.89 + 52 =
  37. 37.72 + 21 =
  38. 38.51 + 44 =
  39. 39.87 + 17 =
  40. 40.29 + 78 =

Answer key

  1. 39
  2. 156
  3. 36
  4. 125
  5. 134
  6. 38
  7. 97
  8. 148
  9. 87
  10. 165
  11. 98
  12. 134
  13. 92
  14. 97
  15. 107
  16. 88
  17. 118
  18. 123
  19. 140
  20. 83
  21. 63
  22. 105
  23. 98
  24. 65
  25. 52
  26. 175
  27. 130
  28. 105
  29. 116
  30. 121
  31. 145
  32. 96
  33. 100
  34. 105
  35. 123
  36. 141
  37. 93
  38. 95
  39. 104
  40. 107

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