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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 383 · 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. 1.42 + 86 =
  2. 2.74 + 59 =
  3. 3.34 + 23 =
  4. 4.29 + 13 =
  5. 5.21 + 87 =
  6. 6.47 + 89 =
  7. 7.29 + 71 =
  8. 8.39 + 53 =
  9. 9.65 + 22 =
  10. 10.59 + 55 =
  11. 11.61 + 29 =
  12. 12.80 + 51 =
  13. 13.25 + 71 =
  14. 14.58 + 57 =
  15. 15.37 + 31 =
  16. 16.80 + 74 =
  17. 17.24 + 75 =
  18. 18.53 + 68 =
  19. 19.75 + 27 =
  20. 20.30 + 86 =
  21. 21.63 + 25 =
  22. 22.64 + 54 =
  23. 23.42 + 61 =
  24. 24.22 + 57 =
  25. 25.84 + 53 =
  26. 26.55 + 61 =
  27. 27.27 + 18 =
  28. 28.24 + 86 =
  29. 29.76 + 75 =
  30. 30.21 + 75 =
  31. 31.45 + 23 =
  32. 32.70 + 57 =
  33. 33.22 + 34 =
  34. 34.29 + 75 =
  35. 35.70 + 23 =
  36. 36.66 + 51 =
  37. 37.52 + 26 =
  38. 38.76 + 54 =
  39. 39.87 + 72 =
  40. 40.29 + 82 =

Answer key

  1. 128
  2. 133
  3. 57
  4. 42
  5. 108
  6. 136
  7. 100
  8. 92
  9. 87
  10. 114
  11. 90
  12. 131
  13. 96
  14. 115
  15. 68
  16. 154
  17. 99
  18. 121
  19. 102
  20. 116
  21. 88
  22. 118
  23. 103
  24. 79
  25. 137
  26. 116
  27. 45
  28. 110
  29. 151
  30. 96
  31. 68
  32. 127
  33. 56
  34. 104
  35. 93
  36. 117
  37. 78
  38. 130
  39. 159
  40. 111

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