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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 639 · 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 + 79 =
  2. 2.85 + 29 =
  3. 3.32 + 44 =
  4. 4.29 + 43 =
  5. 5.21 + 38 =
  6. 6.25 + 26 =
  7. 7.60 + 51 =
  8. 8.28 + 25 =
  9. 9.26 + 22 =
  10. 10.86 + 83 =
  11. 11.75 + 51 =
  12. 12.76 + 81 =
  13. 13.54 + 42 =
  14. 14.48 + 38 =
  15. 15.50 + 67 =
  16. 16.36 + 57 =
  17. 17.42 + 25 =
  18. 18.71 + 29 =
  19. 19.65 + 31 =
  20. 20.62 + 32 =
  21. 21.51 + 78 =
  22. 22.81 + 73 =
  23. 23.68 + 75 =
  24. 24.26 + 71 =
  25. 25.64 + 24 =
  26. 26.55 + 47 =
  27. 27.75 + 49 =
  28. 28.59 + 18 =
  29. 29.71 + 84 =
  30. 30.74 + 14 =
  31. 31.51 + 57 =
  32. 32.62 + 61 =
  33. 33.82 + 88 =
  34. 34.84 + 87 =
  35. 35.54 + 62 =
  36. 36.84 + 47 =
  37. 37.35 + 88 =
  38. 38.62 + 49 =
  39. 39.89 + 59 =
  40. 40.27 + 16 =

Answer key

  1. 156
  2. 114
  3. 76
  4. 72
  5. 59
  6. 51
  7. 111
  8. 53
  9. 48
  10. 169
  11. 126
  12. 157
  13. 96
  14. 86
  15. 117
  16. 93
  17. 67
  18. 100
  19. 96
  20. 94
  21. 129
  22. 154
  23. 143
  24. 97
  25. 88
  26. 102
  27. 124
  28. 77
  29. 155
  30. 88
  31. 108
  32. 123
  33. 170
  34. 171
  35. 116
  36. 131
  37. 123
  38. 111
  39. 148
  40. 43

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