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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 50 · 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. 1.68 + 58 =
  2. 2.57 + 72 =
  3. 3.67 + 59 =
  4. 4.75 + 72 =
  5. 5.23 + 29 =
  6. 6.47 + 64 =
  7. 7.32 + 31 =
  8. 8.28 + 49 =
  9. 9.55 + 17 =
  10. 10.65 + 87 =
  11. 11.84 + 77 =
  12. 12.53 + 83 =
  13. 13.36 + 17 =
  14. 14.41 + 31 =
  15. 15.80 + 29 =
  16. 16.25 + 58 =
  17. 17.65 + 16 =
  18. 18.86 + 16 =
  19. 19.85 + 12 =
  20. 20.85 + 66 =
  21. 21.49 + 41 =
  22. 22.86 + 68 =
  23. 23.23 + 85 =
  24. 24.73 + 75 =
  25. 25.40 + 51 =
  26. 26.59 + 38 =
  27. 27.44 + 26 =
  28. 28.36 + 15 =
  29. 29.71 + 74 =
  30. 30.72 + 18 =
  31. 31.34 + 73 =
  32. 32.54 + 19 =
  33. 33.43 + 54 =
  34. 34.59 + 69 =
  35. 35.36 + 54 =
  36. 36.32 + 84 =
  37. 37.83 + 69 =
  38. 38.62 + 51 =
  39. 39.44 + 63 =
  40. 40.80 + 45 =

Answer key

  1. 126
  2. 129
  3. 126
  4. 147
  5. 52
  6. 111
  7. 63
  8. 77
  9. 72
  10. 152
  11. 161
  12. 136
  13. 53
  14. 72
  15. 109
  16. 83
  17. 81
  18. 102
  19. 97
  20. 151
  21. 90
  22. 154
  23. 108
  24. 148
  25. 91
  26. 97
  27. 70
  28. 51
  29. 145
  30. 90
  31. 107
  32. 73
  33. 97
  34. 128
  35. 90
  36. 116
  37. 152
  38. 113
  39. 107
  40. 125

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