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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 710 · 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. 1.69 + 12 =
  2. 2.61 + 63 =
  3. 3.61 + 85 =
  4. 4.61 + 79 =
  5. 5.22 + 65 =
  6. 6.69 + 75 =
  7. 7.38 + 76 =
  8. 8.66 + 18 =
  9. 9.64 + 47 =
  10. 10.36 + 43 =
  11. 11.65 + 81 =
  12. 12.77 + 57 =
  13. 13.60 + 14 =
  14. 14.62 + 51 =
  15. 15.62 + 54 =
  16. 16.40 + 26 =
  17. 17.44 + 17 =
  18. 18.67 + 18 =
  19. 19.45 + 87 =
  20. 20.61 + 88 =
  21. 21.85 + 61 =
  22. 22.54 + 15 =
  23. 23.29 + 14 =
  24. 24.79 + 26 =
  25. 25.68 + 74 =
  26. 26.62 + 27 =
  27. 27.33 + 76 =
  28. 28.29 + 76 =
  29. 29.36 + 31 =
  30. 30.32 + 45 =
  31. 31.68 + 78 =
  32. 32.51 + 64 =
  33. 33.59 + 22 =
  34. 34.71 + 85 =
  35. 35.26 + 73 =
  36. 36.79 + 67 =
  37. 37.26 + 34 =
  38. 38.28 + 18 =
  39. 39.37 + 76 =
  40. 40.56 + 83 =

Answer key

  1. 81
  2. 124
  3. 146
  4. 140
  5. 87
  6. 144
  7. 114
  8. 84
  9. 111
  10. 79
  11. 146
  12. 134
  13. 74
  14. 113
  15. 116
  16. 66
  17. 61
  18. 85
  19. 132
  20. 149
  21. 146
  22. 69
  23. 43
  24. 105
  25. 142
  26. 89
  27. 109
  28. 105
  29. 67
  30. 77
  31. 146
  32. 115
  33. 81
  34. 156
  35. 99
  36. 146
  37. 60
  38. 46
  39. 113
  40. 139

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