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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 51 · 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. 1.28 + 19 =
  2. 2.81 + 46 =
  3. 3.72 + 13 =
  4. 4.42 + 79 =
  5. 5.30 + 19 =
  6. 6.30 + 15 =
  7. 7.22 + 71 =
  8. 8.25 + 21 =
  9. 9.80 + 16 =
  10. 10.58 + 27 =
  11. 11.34 + 89 =
  12. 12.70 + 46 =
  13. 13.45 + 23 =
  14. 14.71 + 88 =
  15. 15.55 + 57 =
  16. 16.21 + 14 =
  17. 17.51 + 51 =
  18. 18.68 + 59 =
  19. 19.40 + 82 =
  20. 20.72 + 32 =
  21. 21.61 + 15 =
  22. 22.76 + 86 =
  23. 23.83 + 26 =
  24. 24.52 + 47 =
  25. 25.88 + 21 =
  26. 26.87 + 41 =
  27. 27.38 + 15 =
  28. 28.24 + 54 =
  29. 29.54 + 76 =
  30. 30.39 + 23 =
  31. 31.29 + 54 =
  32. 32.31 + 62 =
  33. 33.42 + 48 =
  34. 34.82 + 89 =
  35. 35.75 + 88 =
  36. 36.56 + 36 =
  37. 37.47 + 78 =
  38. 38.77 + 33 =
  39. 39.24 + 52 =
  40. 40.68 + 61 =

Answer key

  1. 47
  2. 127
  3. 85
  4. 121
  5. 49
  6. 45
  7. 93
  8. 46
  9. 96
  10. 85
  11. 123
  12. 116
  13. 68
  14. 159
  15. 112
  16. 35
  17. 102
  18. 127
  19. 122
  20. 104
  21. 76
  22. 162
  23. 109
  24. 99
  25. 109
  26. 128
  27. 53
  28. 78
  29. 130
  30. 62
  31. 83
  32. 93
  33. 90
  34. 171
  35. 163
  36. 92
  37. 125
  38. 110
  39. 76
  40. 129

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