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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 128 · 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. 1.77 + 63 =
  2. 2.38 + 83 =
  3. 3.31 + 23 =
  4. 4.83 + 13 =
  5. 5.60 + 45 =
  6. 6.50 + 58 =
  7. 7.21 + 12 =
  8. 8.29 + 62 =
  9. 9.78 + 69 =
  10. 10.74 + 56 =
  11. 11.50 + 23 =
  12. 12.86 + 44 =
  13. 13.31 + 51 =
  14. 14.82 + 67 =
  15. 15.33 + 75 =
  16. 16.23 + 61 =
  17. 17.87 + 48 =
  18. 18.89 + 27 =
  19. 19.67 + 87 =
  20. 20.26 + 23 =
  21. 21.40 + 33 =
  22. 22.42 + 81 =
  23. 23.86 + 63 =
  24. 24.80 + 65 =
  25. 25.68 + 61 =
  26. 26.47 + 87 =
  27. 27.31 + 61 =
  28. 28.38 + 27 =
  29. 29.28 + 72 =
  30. 30.75 + 18 =
  31. 31.27 + 55 =
  32. 32.48 + 24 =
  33. 33.52 + 69 =
  34. 34.36 + 89 =
  35. 35.82 + 57 =
  36. 36.40 + 12 =
  37. 37.83 + 12 =
  38. 38.23 + 88 =
  39. 39.75 + 22 =
  40. 40.66 + 48 =

Answer key

  1. 140
  2. 121
  3. 54
  4. 96
  5. 105
  6. 108
  7. 33
  8. 91
  9. 147
  10. 130
  11. 73
  12. 130
  13. 82
  14. 149
  15. 108
  16. 84
  17. 135
  18. 116
  19. 154
  20. 49
  21. 73
  22. 123
  23. 149
  24. 145
  25. 129
  26. 134
  27. 92
  28. 65
  29. 100
  30. 93
  31. 82
  32. 72
  33. 121
  34. 125
  35. 139
  36. 52
  37. 95
  38. 111
  39. 97
  40. 114

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