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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 27 · 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. 1.40 + 63 =
  2. 2.45 + 38 =
  3. 3.26 + 33 =
  4. 4.52 + 37 =
  5. 5.43 + 38 =
  6. 6.28 + 38 =
  7. 7.87 + 23 =
  8. 8.86 + 18 =
  9. 9.53 + 59 =
  10. 10.22 + 37 =
  11. 11.77 + 15 =
  12. 12.22 + 34 =
  13. 13.87 + 31 =
  14. 14.25 + 89 =
  15. 15.53 + 43 =
  16. 16.78 + 12 =
  17. 17.44 + 78 =
  18. 18.36 + 24 =
  19. 19.33 + 26 =
  20. 20.43 + 44 =
  21. 21.80 + 69 =
  22. 22.47 + 69 =
  23. 23.68 + 44 =
  24. 24.74 + 69 =
  25. 25.60 + 67 =
  26. 26.69 + 25 =
  27. 27.61 + 33 =
  28. 28.67 + 44 =
  29. 29.37 + 31 =
  30. 30.45 + 79 =
  31. 31.75 + 49 =
  32. 32.58 + 13 =
  33. 33.83 + 22 =
  34. 34.71 + 34 =
  35. 35.48 + 33 =
  36. 36.29 + 66 =
  37. 37.84 + 77 =
  38. 38.36 + 81 =
  39. 39.26 + 12 =
  40. 40.77 + 26 =

Answer key

  1. 103
  2. 83
  3. 59
  4. 89
  5. 81
  6. 66
  7. 110
  8. 104
  9. 112
  10. 59
  11. 92
  12. 56
  13. 118
  14. 114
  15. 96
  16. 90
  17. 122
  18. 60
  19. 59
  20. 87
  21. 149
  22. 116
  23. 112
  24. 143
  25. 127
  26. 94
  27. 94
  28. 111
  29. 68
  30. 124
  31. 124
  32. 71
  33. 105
  34. 105
  35. 81
  36. 95
  37. 161
  38. 117
  39. 38
  40. 103

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