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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 57 · 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. 1.77 + 41 =
  2. 2.86 + 75 =
  3. 3.74 + 36 =
  4. 4.50 + 89 =
  5. 5.80 + 57 =
  6. 6.37 + 51 =
  7. 7.27 + 21 =
  8. 8.83 + 86 =
  9. 9.76 + 39 =
  10. 10.64 + 13 =
  11. 11.32 + 65 =
  12. 12.22 + 16 =
  13. 13.56 + 14 =
  14. 14.31 + 84 =
  15. 15.89 + 47 =
  16. 16.76 + 61 =
  17. 17.73 + 25 =
  18. 18.71 + 61 =
  19. 19.30 + 52 =
  20. 20.33 + 26 =
  21. 21.51 + 41 =
  22. 22.41 + 89 =
  23. 23.65 + 85 =
  24. 24.32 + 17 =
  25. 25.81 + 38 =
  26. 26.35 + 62 =
  27. 27.37 + 23 =
  28. 28.29 + 44 =
  29. 29.57 + 51 =
  30. 30.81 + 41 =
  31. 31.85 + 78 =
  32. 32.21 + 79 =
  33. 33.66 + 42 =
  34. 34.87 + 16 =
  35. 35.89 + 23 =
  36. 36.60 + 41 =
  37. 37.21 + 14 =
  38. 38.24 + 68 =
  39. 39.47 + 48 =
  40. 40.28 + 71 =

Answer key

  1. 118
  2. 161
  3. 110
  4. 139
  5. 137
  6. 88
  7. 48
  8. 169
  9. 115
  10. 77
  11. 97
  12. 38
  13. 70
  14. 115
  15. 136
  16. 137
  17. 98
  18. 132
  19. 82
  20. 59
  21. 92
  22. 130
  23. 150
  24. 49
  25. 119
  26. 97
  27. 60
  28. 73
  29. 108
  30. 122
  31. 163
  32. 100
  33. 108
  34. 103
  35. 112
  36. 101
  37. 35
  38. 92
  39. 95
  40. 99

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