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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 187 · 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. 1.22 + 44 =
  2. 2.33 + 75 =
  3. 3.52 + 86 =
  4. 4.64 + 14 =
  5. 5.23 + 78 =
  6. 6.54 + 51 =
  7. 7.52 + 67 =
  8. 8.37 + 59 =
  9. 9.29 + 34 =
  10. 10.33 + 13 =
  11. 11.53 + 45 =
  12. 12.40 + 54 =
  13. 13.54 + 81 =
  14. 14.89 + 29 =
  15. 15.55 + 55 =
  16. 16.39 + 84 =
  17. 17.36 + 42 =
  18. 18.42 + 31 =
  19. 19.21 + 38 =
  20. 20.28 + 49 =
  21. 21.41 + 38 =
  22. 22.77 + 61 =
  23. 23.75 + 14 =
  24. 24.46 + 48 =
  25. 25.24 + 52 =
  26. 26.35 + 71 =
  27. 27.80 + 25 =
  28. 28.35 + 81 =
  29. 29.53 + 25 =
  30. 30.45 + 48 =
  31. 31.49 + 23 =
  32. 32.79 + 14 =
  33. 33.58 + 42 =
  34. 34.22 + 29 =
  35. 35.24 + 54 =
  36. 36.34 + 37 =
  37. 37.85 + 78 =
  38. 38.40 + 83 =
  39. 39.36 + 24 =
  40. 40.63 + 48 =

Answer key

  1. 66
  2. 108
  3. 138
  4. 78
  5. 101
  6. 105
  7. 119
  8. 96
  9. 63
  10. 46
  11. 98
  12. 94
  13. 135
  14. 118
  15. 110
  16. 123
  17. 78
  18. 73
  19. 59
  20. 77
  21. 79
  22. 138
  23. 89
  24. 94
  25. 76
  26. 106
  27. 105
  28. 116
  29. 78
  30. 93
  31. 72
  32. 93
  33. 100
  34. 51
  35. 78
  36. 71
  37. 163
  38. 123
  39. 60
  40. 111

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