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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 696 · 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. 1.63 + 31 =
  2. 2.86 + 12 =
  3. 3.33 + 26 =
  4. 4.62 + 81 =
  5. 5.32 + 69 =
  6. 6.38 + 15 =
  7. 7.87 + 49 =
  8. 8.59 + 34 =
  9. 9.55 + 58 =
  10. 10.75 + 51 =
  11. 11.21 + 62 =
  12. 12.80 + 29 =
  13. 13.23 + 58 =
  14. 14.75 + 31 =
  15. 15.23 + 29 =
  16. 16.28 + 26 =
  17. 17.26 + 51 =
  18. 18.80 + 63 =
  19. 19.78 + 21 =
  20. 20.22 + 22 =
  21. 21.35 + 79 =
  22. 22.71 + 51 =
  23. 23.81 + 29 =
  24. 24.46 + 63 =
  25. 25.33 + 48 =
  26. 26.77 + 31 =
  27. 27.75 + 16 =
  28. 28.48 + 49 =
  29. 29.42 + 68 =
  30. 30.48 + 16 =
  31. 31.23 + 28 =
  32. 32.23 + 89 =
  33. 33.51 + 84 =
  34. 34.44 + 28 =
  35. 35.60 + 17 =
  36. 36.82 + 39 =
  37. 37.49 + 12 =
  38. 38.35 + 29 =
  39. 39.30 + 22 =
  40. 40.33 + 31 =

Answer key

  1. 94
  2. 98
  3. 59
  4. 143
  5. 101
  6. 53
  7. 136
  8. 93
  9. 113
  10. 126
  11. 83
  12. 109
  13. 81
  14. 106
  15. 52
  16. 54
  17. 77
  18. 143
  19. 99
  20. 44
  21. 114
  22. 122
  23. 110
  24. 109
  25. 81
  26. 108
  27. 91
  28. 97
  29. 110
  30. 64
  31. 51
  32. 112
  33. 135
  34. 72
  35. 77
  36. 121
  37. 61
  38. 64
  39. 52
  40. 64

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