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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 351 · 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. 1.23 + 62 =
  2. 2.33 + 81 =
  3. 3.82 + 71 =
  4. 4.32 + 89 =
  5. 5.80 + 74 =
  6. 6.38 + 87 =
  7. 7.65 + 85 =
  8. 8.85 + 81 =
  9. 9.44 + 51 =
  10. 10.74 + 61 =
  11. 11.51 + 46 =
  12. 12.21 + 69 =
  13. 13.77 + 89 =
  14. 14.65 + 25 =
  15. 15.35 + 37 =
  16. 16.73 + 33 =
  17. 17.72 + 13 =
  18. 18.67 + 14 =
  19. 19.50 + 51 =
  20. 20.32 + 12 =
  21. 21.70 + 48 =
  22. 22.50 + 14 =
  23. 23.68 + 19 =
  24. 24.74 + 25 =
  25. 25.47 + 13 =
  26. 26.38 + 51 =
  27. 27.88 + 27 =
  28. 28.60 + 62 =
  29. 29.37 + 16 =
  30. 30.29 + 61 =
  31. 31.30 + 16 =
  32. 32.36 + 84 =
  33. 33.44 + 58 =
  34. 34.79 + 57 =
  35. 35.45 + 82 =
  36. 36.75 + 71 =
  37. 37.22 + 46 =
  38. 38.24 + 32 =
  39. 39.51 + 45 =
  40. 40.42 + 61 =

Answer key

  1. 85
  2. 114
  3. 153
  4. 121
  5. 154
  6. 125
  7. 150
  8. 166
  9. 95
  10. 135
  11. 97
  12. 90
  13. 166
  14. 90
  15. 72
  16. 106
  17. 85
  18. 81
  19. 101
  20. 44
  21. 118
  22. 64
  23. 87
  24. 99
  25. 60
  26. 89
  27. 115
  28. 122
  29. 53
  30. 90
  31. 46
  32. 120
  33. 102
  34. 136
  35. 127
  36. 146
  37. 68
  38. 56
  39. 96
  40. 103

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