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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 761 · 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. 1.56 + 26 =
  2. 2.49 + 21 =
  3. 3.46 + 65 =
  4. 4.82 + 26 =
  5. 5.71 + 62 =
  6. 6.60 + 51 =
  7. 7.30 + 26 =
  8. 8.71 + 34 =
  9. 9.73 + 39 =
  10. 10.54 + 12 =
  11. 11.21 + 79 =
  12. 12.26 + 71 =
  13. 13.69 + 45 =
  14. 14.38 + 12 =
  15. 15.29 + 13 =
  16. 16.55 + 85 =
  17. 17.50 + 21 =
  18. 18.42 + 37 =
  19. 19.48 + 37 =
  20. 20.32 + 17 =
  21. 21.28 + 66 =
  22. 22.27 + 74 =
  23. 23.76 + 47 =
  24. 24.47 + 51 =
  25. 25.86 + 81 =
  26. 26.89 + 61 =
  27. 27.33 + 81 =
  28. 28.57 + 64 =
  29. 29.35 + 13 =
  30. 30.49 + 16 =
  31. 31.65 + 87 =
  32. 32.45 + 84 =
  33. 33.65 + 19 =
  34. 34.71 + 61 =
  35. 35.30 + 66 =
  36. 36.62 + 26 =
  37. 37.31 + 26 =
  38. 38.45 + 24 =
  39. 39.59 + 41 =
  40. 40.67 + 24 =

Answer key

  1. 82
  2. 70
  3. 111
  4. 108
  5. 133
  6. 111
  7. 56
  8. 105
  9. 112
  10. 66
  11. 100
  12. 97
  13. 114
  14. 50
  15. 42
  16. 140
  17. 71
  18. 79
  19. 85
  20. 49
  21. 94
  22. 101
  23. 123
  24. 98
  25. 167
  26. 150
  27. 114
  28. 121
  29. 48
  30. 65
  31. 152
  32. 129
  33. 84
  34. 132
  35. 96
  36. 88
  37. 57
  38. 69
  39. 100
  40. 91

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