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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 555 · 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. 1.67 + 61 =
  2. 2.49 + 87 =
  3. 3.79 + 12 =
  4. 4.72 + 77 =
  5. 5.71 + 58 =
  6. 6.29 + 16 =
  7. 7.28 + 61 =
  8. 8.71 + 57 =
  9. 9.75 + 31 =
  10. 10.44 + 76 =
  11. 11.77 + 62 =
  12. 12.27 + 48 =
  13. 13.44 + 42 =
  14. 14.87 + 33 =
  15. 15.57 + 57 =
  16. 16.64 + 38 =
  17. 17.80 + 13 =
  18. 18.31 + 82 =
  19. 19.33 + 71 =
  20. 20.26 + 18 =
  21. 21.26 + 47 =
  22. 22.75 + 66 =
  23. 23.89 + 17 =
  24. 24.74 + 46 =
  25. 25.61 + 21 =
  26. 26.65 + 84 =
  27. 27.22 + 46 =
  28. 28.36 + 48 =
  29. 29.86 + 51 =
  30. 30.79 + 71 =
  31. 31.60 + 14 =
  32. 32.89 + 13 =
  33. 33.76 + 37 =
  34. 34.69 + 66 =
  35. 35.76 + 22 =
  36. 36.75 + 63 =
  37. 37.26 + 43 =
  38. 38.85 + 37 =
  39. 39.50 + 71 =
  40. 40.75 + 21 =

Answer key

  1. 128
  2. 136
  3. 91
  4. 149
  5. 129
  6. 45
  7. 89
  8. 128
  9. 106
  10. 120
  11. 139
  12. 75
  13. 86
  14. 120
  15. 114
  16. 102
  17. 93
  18. 113
  19. 104
  20. 44
  21. 73
  22. 141
  23. 106
  24. 120
  25. 82
  26. 149
  27. 68
  28. 84
  29. 137
  30. 150
  31. 74
  32. 102
  33. 113
  34. 135
  35. 98
  36. 138
  37. 69
  38. 122
  39. 121
  40. 96

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