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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 553 · 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. 1.79 + 55 =
  2. 2.65 + 26 =
  3. 3.77 + 33 =
  4. 4.67 + 21 =
  5. 5.33 + 83 =
  6. 6.55 + 51 =
  7. 7.85 + 78 =
  8. 8.48 + 68 =
  9. 9.35 + 43 =
  10. 10.39 + 37 =
  11. 11.84 + 61 =
  12. 12.53 + 76 =
  13. 13.71 + 59 =
  14. 14.57 + 35 =
  15. 15.57 + 25 =
  16. 16.45 + 39 =
  17. 17.85 + 81 =
  18. 18.31 + 24 =
  19. 19.30 + 43 =
  20. 20.80 + 42 =
  21. 21.25 + 31 =
  22. 22.78 + 45 =
  23. 23.45 + 59 =
  24. 24.69 + 25 =
  25. 25.22 + 25 =
  26. 26.62 + 23 =
  27. 27.22 + 19 =
  28. 28.53 + 82 =
  29. 29.69 + 61 =
  30. 30.75 + 65 =
  31. 31.35 + 65 =
  32. 32.58 + 32 =
  33. 33.76 + 39 =
  34. 34.33 + 16 =
  35. 35.84 + 44 =
  36. 36.28 + 43 =
  37. 37.53 + 19 =
  38. 38.73 + 87 =
  39. 39.84 + 38 =
  40. 40.31 + 27 =

Answer key

  1. 134
  2. 91
  3. 110
  4. 88
  5. 116
  6. 106
  7. 163
  8. 116
  9. 78
  10. 76
  11. 145
  12. 129
  13. 130
  14. 92
  15. 82
  16. 84
  17. 166
  18. 55
  19. 73
  20. 122
  21. 56
  22. 123
  23. 104
  24. 94
  25. 47
  26. 85
  27. 41
  28. 135
  29. 130
  30. 140
  31. 100
  32. 90
  33. 115
  34. 49
  35. 128
  36. 71
  37. 72
  38. 160
  39. 122
  40. 58

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