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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 251 · 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. 1.27 + 52 =
  2. 2.29 + 31 =
  3. 3.83 + 65 =
  4. 4.71 + 32 =
  5. 5.86 + 23 =
  6. 6.59 + 54 =
  7. 7.85 + 83 =
  8. 8.22 + 71 =
  9. 9.77 + 41 =
  10. 10.30 + 31 =
  11. 11.83 + 41 =
  12. 12.54 + 65 =
  13. 13.29 + 85 =
  14. 14.44 + 21 =
  15. 15.66 + 46 =
  16. 16.31 + 51 =
  17. 17.23 + 22 =
  18. 18.33 + 32 =
  19. 19.66 + 21 =
  20. 20.46 + 47 =
  21. 21.46 + 73 =
  22. 22.65 + 79 =
  23. 23.58 + 24 =
  24. 24.75 + 57 =
  25. 25.37 + 38 =
  26. 26.71 + 31 =
  27. 27.40 + 41 =
  28. 28.30 + 71 =
  29. 29.39 + 15 =
  30. 30.84 + 37 =
  31. 31.67 + 49 =
  32. 32.67 + 38 =
  33. 33.45 + 71 =
  34. 34.79 + 63 =
  35. 35.75 + 59 =
  36. 36.69 + 47 =
  37. 37.52 + 47 =
  38. 38.81 + 65 =
  39. 39.73 + 61 =
  40. 40.31 + 16 =

Answer key

  1. 79
  2. 60
  3. 148
  4. 103
  5. 109
  6. 113
  7. 168
  8. 93
  9. 118
  10. 61
  11. 124
  12. 119
  13. 114
  14. 65
  15. 112
  16. 82
  17. 45
  18. 65
  19. 87
  20. 93
  21. 119
  22. 144
  23. 82
  24. 132
  25. 75
  26. 102
  27. 81
  28. 101
  29. 54
  30. 121
  31. 116
  32. 105
  33. 116
  34. 142
  35. 134
  36. 116
  37. 99
  38. 146
  39. 134
  40. 47

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